Answers
The two column proof that shows that ΔADC ~ ΔDBC is as shown below.
How to complete the two column proof?A two-column proof is defined as a geometric proof that is said to consist of a list of statements, and the reasons for which those statements are true. The statements are thus listed in a column on the left, with the reasons for which the specific statements can be made are now listed in the right column.
The complete two column proof is expressed as:
Statement 1: ∠ADC is a right angle
Reason 1: Given
Statement 2: DB is perpendicular to AC
Reason 2: Given
Statement 3: ∠DBC is a right angle
Reason 3: Definition of Perpendicular
Statement 4: ∠ADC ≅ ∠DBC
Reason 4: All right angles are congruent
Statement 5: ∠C ≅ ∠C
Reason 5: Reflexive Property of Congruence
Statement 6: ΔADC ~ ΔDBC
Reason 6: AA Similarity
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Related Questions
Find the sum of the first n terms
using the formula:
a(1-r^n)/1-r
1, 5/3, 25/9, 125/27, 625/81
This would be a big help
Answers
The total of the first four terms is thus 8/3.
What does sum mean?The outcome of adding two or even more numbers or phrases is known as the sum in mathematics. The sum is a method of bringing things together as a result. To put it another way, adding any number of numbers together results in a previous result or total.
The sum of a Fibonacci sequence that has the initial component a = 1 and the general ratio r = 5/3 is determined using the formula you gave.
We enter these numbers into the formula to determine the sum of the initial n terms:
S(n) = [tex]a(1-r^n)/(1-r)[/tex]
S(n) = [tex]1(1-(5/3)^n)/(1-5/3)[/tex]
S(n) = [tex]3/2(1-(5/3)^n)[/tex]
So, we add n to this formula to get the sum of the initial n terms of a given sequence:
S(n) = [tex]3/2(1-(5/3)^n)[/tex]
For instance, we replace n = 4 to get the sum of the initial four terms:
S(4) = [tex]3/2(1-(5/3)^4)[/tex]
S(4) = 3/2(1-625/81)
S(4) = 3/2(144/81)
S(4) = 72/27
S(4) = 8/3
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The total of the first four terms is thus 8/3.
What does sum mean?The outcome of adding two or even more numbers or phrases is known as the sum in mathematics. The sum is a method of bringing things together as a result. To put it another way, adding any number of numbers together results in a previous result or total.
The sum of a Fibonacci sequence that has the initial component a = 1 and the general ratio r = 5/3 is determined using the formula you gave.
We enter these numbers into the formula to determine the sum of the initial n terms:
S(n) = [tex]a(1-r^{n} )/(1-r)[/tex]
S(n) = [tex]1(1-(5/3)^{n} /(1-5/3)[/tex]
S(n) = [tex]3/2(1-(5/3)^{n} )[/tex]
So, we add n to this formula to get the sum of the initial n terms of a given sequence:
S(n) = 3/2(1 - [tex](5/3)^{n}[/tex] )
For instance, we replace n = 4 to get the sum of the initial four terms:
S(4) = [tex]3/2(1-(5/3)^{4} )[/tex]
S(4) = 3/2(1-625/81)
S(4) = 3/2(144/81)
S(4) = 72/27
S(4) = 8/3
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complete ques is:
Find the sum of the first n terms ( 1,2,3,4,5.......n)
using the formula:
a(1-r^n)/1-r
1, 5/3, 25/9, 125/27, 625/81
The perihelion is?
The equation for the orbit of planet A around the sun is?
Answers
The perihelion is the point in a planet's orbit where it is closest to the sun.
The equation for the orbit of a planet around the sun depends on various factors, such as the shape of the orbit, the mass of the planet, and the gravitational force between the planet and the sun. Kepler's laws of planetary motion provide a framework for understanding the motion of planets in orbit, and the equations used to describe these orbits are generally based on these laws. The specific equation for the orbit of planet A would depend on the specific parameters of that planet's orbit.
answered
Find the points on the line x=1
where the circle with equation
2x²+2y²-5x+7y-36-0 intersect
Answers
Answer: To find the points where the circle intersects the line x=1, we substitute x=1 in the equation of the circle:
2(1)² + 2y² - 5(1) + 7y - 36 = 0
Simplifying, we get:
2y² + 7y - 31 = 0
We can solve this quadratic equation by using the quadratic formula:
y = (-7 ± √(7² - 4(2)(-31))) / (2(2))
y = (-7 ± √225) / 4
y = (-7 ± 15) / 4
So the two possible values of y are:
y = 2 or y = -8/2 = -4
Therefore, the points where the circle intersects the line x=1 are (1, 2) and (1, -4).
Step-by-step explanation:
Which statement correctly describes the value of the expression 8×7/9
A) less than 7/9
B) greater than 9
C) between 8 and 9
D) between 7/9 and 8
Answers
The value of the expression is between 7/9 and 8, since 7/9 < 56/9 < 8. So the correct option is D.
Describe Algebraic Expression?Algebraic expressions can represent real-world situations, formulas, and equations. They are commonly used in algebra, which is a branch of mathematics that deals with symbols and the rules for manipulating these symbols.
Algebraic expressions are important tools in solving equations and real-world problems that involve variables and unknowns. They are also used in calculus, physics, engineering, and other fields that require mathematical modeling and analysis.
The value of the expression 8×7/9 can be simplified using the order of operations (PEMDAS) as follows:
8×7/9 = (8×7)/9 = 56/9
Therefore, the value of the expression is between 7/9 and 8, since:
7/9 < 56/9 < 8
So the correct statement is: D) between 7/9 and 8.
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Tom wishes to purchase a property that has been valued at $300,000. He has 25% of this amount available as a cash deposit, and will require a mortgage for the remaining amount. The bank offers him a 25-year mortgage at 2% interest. Calculate his monthly payments.
Round your answer to the nearest cent.
Do NOT round until you have calculated the final answer.
Answers
Step-by-step explanation:
In the first place,Tom already has 25%*$300,000=$75,000
This implies that the mortgage amount=$300,000-$75,000=$225,000
In order to ascertain the total interest Tom would pay it would necessary to know the total amount Tom would have to pay back in respect of the mortgage since the total interest is the difference between total amount repayable less the present worth of the mortgage of $225,000
FV=PV*(1+r)^n
FV is the future worth of the mortgage i.e total amount repayable
PV is the present worth of $225,000
r is the rate of interest of 2% yearly,but 0.17% monthly(2%/12)
n is the number of month it would take Tom to repay the mortgage i.e 25 years multiplied by 12 300 months
FV=$225,000*(1+0.17%)^300=$ 374,528.31
Total interest=$ 374,528.31-$225,000=$149,528.31
so hmmm 25% of that 300,000 is going as a downpayment, so he need the loan for the remaining 75% of that hmmm
[tex]\begin{array}{|c|ll} \cline{1-1} \textit{\textit{\LARGE a}\% of \textit{\LARGE b}}\\ \cline{1-1} \\ \left( \cfrac{\textit{\LARGE a}}{100} \right)\cdot \textit{\LARGE b} \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{75\% of 300000}}{\left( \cfrac{75}{100} \right)300000}\implies 225000[/tex]
so for that much, so since he'll be making monthly payments, the compounding period will be monthly, now, we're assuming the payments are at the end of each month.
[tex]~~~~~~~~~~~~\underset{\textit{payments at the end of the period}}{\textit{Payments of an ordinary annuity}} \\\\ pmt=A\left[ \cfrac{\frac{r}{n}}{\left( 1+\frac{r}{n} \right)^{nt}-1} \right][/tex]
[tex]\begin{cases} A=\textit{accumulated amount}\dotfill &225000\\ pmt=\textit{periodic payments}\\ r=rate\to 2\%\to \frac{2}{100}\dotfill &0.02\\ n= \begin{array}{llll} \textit{times it compounds per year}\\ \textit{monthly, thus twelve} \end{array}\dotfill &12\\ t=years\dotfill &25 \end{cases}[/tex]
[tex]pmt=225000\left[ \cfrac{\frac{0.02}{12}}{\left( 1+\frac{0.02}{12} \right)^{12 \cdot 25}-1} \right] \\\\\\ pmt=225000\left[ \cfrac{\frac{1}{600}}{\left( \frac{601}{600} \right)^{300}-1} \right]\implies pmt\approx 578.67[/tex]
Tara creates a budget for her weekly expenses. The graph shows how X much money is in the account at different times. Find the slope of the line. Then tell what rate the slope represents.
Answers
The slope of the line is -50 and it means that the amount of money in the account is decreasing at a rate of $50 every week.
What is meant by the slope of the line?
A line's slope is defined as the ratio of the change in the y coordinates to the change in the x coordinate. Both the net change in the y-coordinate and the net change in the x-coordinate are denoted by y and x, respectively.
As a result, m = change in y/change in x is the formula for the change in the y-coordinate with respect to the change in the x-coordinate.
where "m" represents a line's slope.
A line's slope provides information on the steepness and direction of the line. By calculating the difference between the coordinates of the two points, (x1,y1) and (x2,y2), it is simple to calculate the slope of a straight line between them.
The complete question is given below.
The two points on the graph are (4, 2400) and (12, 2000).
(x₁ , y₁) = (4, 2400)
(x₂ , y₂) = (12, 2000)
The slope of the graph can be found using the following formula.
Slope m = [tex]\frac{y_2-y_1}{x_2-x_1}[/tex] = [tex]\frac{2000-2400}{12-4}[/tex] = [tex]\frac{-400}{8}[/tex] = -50
Therefore the slope of the line is -50 and it means that the amount of money in the account is decreasing at a rate of $50 every week.
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What is 24 and 816,000 equals blank divided by 10 to the fifth power
Answers
Answer: We have the equation:
24,816,000 = x / 10^5
To solve for x, we can multiply both sides by 10^5:
24,816,000 * 10^5 = x
Using a calculator or long multiplication, we can simplify this to:
2,481,600,000,000 = x
Therefore, 24,816,000 is equal to 2,481,600,000,000 divided by 10 to the fifth power.
Step-by-step explanation:
I will mark you brainiest!
Which of the following methods is not used to prove triangles are congruent?
A) AAA
B) SAS
C) SSS
D) ASA
Answers
Answer:
A) AAA yessss
Write the equation of the line that passes through the points (3, -4) and (7, 6). Put
your answer in fully simplified point-slope form, unless it is a vertical or horizontal
line.
Answers
Answer:
Step-by-step explanation:
To write the equation of the line that passes through the points (3, -4) and (7, 6), we can follow these steps:
Step 1: Find the slope of the line
The slope of a line passing through two points (x1, y1) and (x2, y2) is given by:
slope = (y2 - y1) / (x2 - x1)
Plugging in the given values, we get:
slope = (6 - (-4)) / (7 - 3)
slope = 10 / 4
slope = 5 / 2
Step 2: Use point-slope form to write the equation of the line
Point-slope form of a line with slope m passing through a point (x1, y1) is given by:
y - y1 = m(x - x1)
We can use either of the given points to write the equation. Let's use (3, -4):
y - (-4) = (5/2)(x - 3)
Simplifying this equation, we get:
y + 4 = (5/2)x - (15/2)
Subtracting 4 from both sides, we get:
y = (5/2)x - (23/2)
This is the equation of the line in point-slope form.
Step 3: Simplify the equation if it is not in point-slope form
The equation we obtained in step 2 is already in point-slope form, so we do not need to simplify it any further.
Note: If the line was horizontal (i.e., it had zero slope), then its equation would be y = constant, where the constant is the y-coordinate of any point on the line. If the line was vertical (i.e., its slope was undefined), then its equation would be x = constant, where the constant is the x-coordinate of any point on the line.
5. A rock is thrown directly upward with an initial velocity of 79 feet per second from a cliff 50 feet above a beach. The height of the rock above the beach (h) after t seconds is given by the equation h = -16t² + 79t + 50. The graph below shows the rock's height as a function of time.
Answers
The rock will be at a height of 125 feet after 0.49 and 4.76 seconds.
Finding the time:In the given problem we have a function h(t) that represents the height of the rock that is from the ground of the beach where the variable represents the time travel by the rock.
Assume t as required time equates the given function to the given height and solve for the value of 't'.
Here we have
A rock is thrown directly upward with an initial velocity of 79 feet per second from a cliff 50 feet above a beach.
The height of the rock above the beach (h) after t seconds is given by the equation h(t) = -16t² + 79t + 50.
Let after t seconds the height will be 125 feet
=> h(t) = 125
=> -16t² + 79t + 50 = 125
=> -16t² + 79t - 75 = 0
To solve this quadratic equation, we can use the quadratic formula:
=> x = [-b ± √(b² - 4ac)]/ 2a
Here a = -16, b = 79, and c = -75.
t = [-79 ± √(79² - 4(-16)(-75))] / 2(-16)
t = (-79 ± √(6241 - 4800)) / -32
t = (-79 ± √1441) / -32
So, the two solutions are:
t = (-79 + √1441) / -32 and t = (-79 - √1441) / -32
t ≈ 0.497 or t ≈ 4.763
Therefore,
The rock will be at a height of 125 feet after 0.49 and 4.76 seconds
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Solve for s. 0.5s + 1=7+4.5s=
Answers
Answer:
s = -1.5
Step-by-step explanation:
0.5s + 1 = 7 + 4.5s
So we can combine like terms
Put 0.5s to other side
Put 7 to other side
Then you get the equation:
1 - 7 = 4.5s - 0.5s
So we simplify:
-6 = 4s
That means
s = -6/4
s = -1.5
Hope this helps!
 Find the area of the shaded sector.
Answer In Exact Form (don't put pi in calculator, simplify your decimal answer to a fraction, and put pi symbol in answer).
Answers
The area of the shaded sector is equal to: A. 415π/2 ft².
How to calculate the area of a sector?Mathematically, the area of a sector can be calculated by using this formula:
Area of sector = θπr²/360
Where:
r represents the radius of a circle.θ represents the central angle.Substituting the given parameters into the area of a sector formula, we have the following;
Area of sector = 332(π/180) × (15)²/2
Area of sector = 74,700π/180 × 1/2
Area of sector = 415π/2 ft²
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1. Solve: (6 + 3)2 – 17 × 3 + 70
Answers
The solution of this expression is 37
Numerical expressionsTo solve this, first calculate the operations in parentheses.
Then perform the other operations, following the order of resolution
[tex]\begin{array}{l}\sf (6 + 3)2-17\times 3 + 70\\\sf 9\times 2-51+ 70\\\sf 18-51+ 70\\\sf 88-51\\\therefore \bf 37\end{array}[/tex]
For this expression, the result is 37
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Use the word bank to help identify each part of the quadrilateral.
word bank: base, leg, parallel, midsegment, angle, diagonal, side.
Answers
- Leg: A side of the quadrilateral that is not part of the base.
- Parallel: Two sides of the quadrilateral that run side by side and never intersect.
- Midsegment: A line segment that connects the midpoints of two sides of the quadrilateral.
- Angle: The space between two intersecting lines, measured in degrees.
- Diagonal: A line segment that connects two non-adjacent vertices of the quadrilateral.
- Side: Any of the four line segments that make up the edges of the quadrilateral.
Steven sold 10 cabbages at K2.00 each, 20 heaps of kaukau at K5 each, and 10 heaps of potato at K3.00 each. What is Steven's total earning?
Answers
Answer:
K150
Step-by-step explanation:
10 x K2.00 = K20.00
20 x K5.00 = K100.00
10 x K3.00= K30.00
20+100+30= K150
(-50) ÷ what is -1, number in the blank will be
Answers
A toy company is building dollhouse furniture. A rectangle door of a dollhouse has a height of 7 centimeters and a width of 3 centimeters. What is the perimeter of the door on a scale drawing that uses the scale 3.5?
Answers
Answer: To find the perimeter of the door on a scale drawing, we need to first determine the dimensions of the door on the scale drawing.
If the actual height of the door is 7 centimeters, then the height on the scale drawing will be:
7 cm ÷ 3.5 = 2 cm
Similarly, if the actual width of the door is 3 centimeters, then the width on the scale drawing will be:
3 cm ÷ 3.5 = 0.857 cm
Now we can use these dimensions to find the perimeter on the scale drawing:
Perimeter = 2 × (height + width) = 2 × (2 cm + 0.857 cm) = 2 × 2.857 cm = 5.714 cm
Therefore, the perimeter of the door on the scale drawing is 5.714 centimeters.
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Two cross sections the same or different
Shape
Answers
Answer:same
Step-by-step explanation:because I said so
What is entrepreneurs education
Answers
Answer: What an entrepreneur really is, though, is someone who runs their own business and takes a risk to do it.
Step-by-step explanation:
The following are reasons to put your money in a saving account. (Check all that apply)
Money collects interest.
Get a rebate back in the mail.
Money is safe and insured.
Answers
The cοrrect respοnse is that mοney cοllects interest and mοney is safe and insured.
Why nοt explain interest?The fee yοu spend tο bοrrοw the mοney οr the fee yοu pay tο lend the mοney is called interest. Interest is frequently calculated as a yearly percentage οf the amοunt bοrrοwed. This percentage represents the lοan's interest rate.
The interest fοrmula is what?Interest equals P, R, and T is the fundamental interest fοrmula. P is the initial value (the beginning balance). Rate οf Interest, R (usually per year, expressed as a decimal). T is the sum οf all time frames (generally οne-year time periοds).
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2. The back of Nico's truck is 7 feet long, 4 feet wide, and 8 feet tall. He has several boxes of important papers that he needs to move. Each box of papers is shaped like a cube, measuring 1 foot on each side. K How many boxes of papers can Nico pack into the back of his truck? Show your work. (Try drawing a picture of the back of the truck and how many boxes can stack in there to help you see the answer better. Possible extra credit for your drawing.) Answer:
Answers
Based on division operation, the number of boxes of papers that the back of Nico's truck can stack in is 224.
What is division operation?Division operation is one of the four basic mathematical operations, including addition, subtraction, and multiplication.
Division operation involves the dividend divided by the divisor to produce a result known as the quotient.
In this situation, the volume of Nico's truck is determined as the dividend. The volume of each box of paper is determined as the divisor.
The result of the division operation is the quotient showing the number of boxes the truck can contain.
The length of Nico's truck = 7 feet
The width of Nico's truck = 4 feet
The height of Nico's truck = 8 feet
The volume that Nico's tuck can contain = 224 cubic feet (7 × 4 × 8)
= 224 feet³
The length of each box = 1 foot
The width of each box = 1 foot
The height of each box = 1 foot
The volume of each box of papers = 1 feet³ (1 × 1 × 1)
The number of boxes the truck can contain = 224 boxes (224/1)
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PZ HURRY 15 POINTS
At a recent football game of 8,450 in attendance, 150 people were asked what they prefer on a hot dog. The results are shown.
Ketchup Relish Chili
54 36 60
Based on the data in this sample, how many of the people in attendance would prefer ketchup on a hot dog?
4,225
3,380
3,127
3,042
Answers
It can be estimated that approximately 3,042 people in attendance would prefer ketchup on a hot dog.
Thus, the correct answer is 3,042.
To determine how many people in attendance would prefer ketchup on a hot dog based on the data from the sample, we need to calculate the proportion of people who prefer ketchup and apply it to the total attendance.
The sample indicates that out of 150 people surveyed:
54 people prefer ketchup
36 people prefer relish
60 people prefer chili
To find the proportion of people who prefer ketchup, we divide the number of people who prefer ketchup by the total number of people surveyed:
Proportion of people who prefer ketchup = 54 / 150 = 0.36
Now, to estimate the number of people in attendance who would prefer ketchup on a hot dog, we multiply the proportion calculated above by the total attendance:
Estimated number of people who prefer ketchup = 0.36 [tex]\times[/tex] 8,450 = 3,042
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Find the volume of the composite figure.
Figure not drawn to scale
Answers
The volume of the two cuboid added together will be 192 cm³.
what exactly is a cuboid?
A cuboid, also known as a rectangular prism, is a three-dimensional solid shape that has six rectangular faces. It is a type of polyhedron, a geometric figure with flat faces and straight edges.
A cuboid has three pairs of congruent and parallel faces, with each pair being congruent to the other. These pairs of opposite faces are known as bases, and the other four faces are called lateral faces. The lateral faces are also rectangles and are perpendicular to the bases.
Now,
As Volume of the cuboid= L*B*H
where l=length, B=Breadth and H=Height
and volume of the figure =volume of 2 cuboids
=8*4*3+10*3*4
=72+120
=192 cm³
Hence,
The volume of the two cuboid added together will be 192 cm³.
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Help!!
Question
Triangle ABC is similar to triangle DEF. The length of BC¯¯¯¯¯ is 44 cm. The length of DE¯¯¯¯¯ is 14 cm. The length of EF¯¯¯¯¯ is 22 cm.
What is the length of AB¯¯¯¯¯?
Enter your answer in the box.
cm
Answers
The length of AB which is the missing length side of the similar triangles would be = 28 cm.
How to calculate the missing length of a triangle?To calculate the missing length of the triangle = AB , the scale factor should be determined.
The scale factor that exists between two similar object shows the number of times the original object can be found in the new formed one.
The scale factor = dimensions of new object/ dimensions of original object.
A side of original = EF =22cm
A side of the new triangle = BC = 44
Scale factor = 44/22 = 2
Therefore the missing length of the new triangle = 14×2 = 28cm
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Solve x2 – 18x + 81 = 4 by completing the square. Select any solutions that apply. A. x = –11 B. x = –7 C. x = 7 D. x = 11
Answers
The solutions to the equation x² - 18x + 81 = 4 by completing the square are x = 9 + 2i and x = 9 - 2i.None of the answer choices A, B, C, or D are correct.
What is an equation?An equation is a mathematical statement that shows the equality between two expressions, often containing variables and mathematical operations.
To solve the equation x² - 18x + 81 = 4 by completing the square, we can follow these steps:
x² - 18x + 77 = 0
Divide both sides by the coefficient of x² to make the coefficient 1:
x² - 18x + (81/1) = -77/1
x² - 18x + 81 = -77
Add the square of half the coefficient of x to both sides of the equation:
x² - 18x + (9)² = -77 + (9)²
x² - 18x + 81 = -4
(x - 9)² = -4
x - 9 = ±√(-4)
x - 9 = ±2i (where i is the imaginary unit)
x = 9 ±2i
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The demand for a product is given by p+5q= 380 or, q = (380-p)/5 and the supply for this product is given by p-3q = 172 or, q = (p-172)/3 The price at which the quantity demande
Answers
Answer:
The equilibrium price is $250.
The equilibrium quantity is 26 units.
Step-by-step explanation:
To find the equilibrium price, we need to find the price at which the quantity demanded equals the quantity supplied. This occurs when q (quantity demanded) equals q (quantity supplied).
So, we can set the two equations for q equal to each other:
(380-p)/5 = (p-172)/3
To solve for p, we can cross-multiply and simplify:
3(380-p) = 5(p-172)
1140 - 3p = 5p - 860
1140 + 860 = 8p
2000 = 8p
p = 250
Therefore, the equilibrium price is $250. We can plug this value back into either equation for q to find the equilibrium quantity.
Using q = (380-p)/5, we get:
q = (380-250)/5 = 26
So the equilibrium quantity is 26 units.
Avani is trying to find the height of a radio antenna on the roof of a local building. She stands at a horizontal distance of 21 meters from the building. The angle of elevation from her eyes to the roof ((point AA)) is 38^{\circ} ∘ , and the angle of elevation from her eyes to the top of the antenna ((point BB)) is 46^{\circ} ∘ . If her eyes are 1.66 meters from the ground, find the height of the antenna ((the distance from point AA to point BB)). Round your answer to the nearest tenth of a meter if necessary.
Answers
Answer:
Let's call the height of the antenna "h".
First, we can use the angle of elevation of 38^{\circ} ∘ to find the height of point A above the ground.
tan(38^{\circ}) = \frac{h}{21}
h = 21 \cdot tan(38^{\circ})
h \approx 15.6
So point A is approximately 15.6 meters above the ground.
Next, we can use the angle of elevation of 46^{\circ} ∘ to find the height of point B above the ground.
tan(46^{\circ}) = \frac{h}{d}
h = d \cdot tan(46^{\circ})
We can find the value of "d" using the Pythagorean theorem.
d^2 = 21^2 + 15.6^2
d \approx 25.7
So the distance from point A to point B is approximately 25.7 meters.
Finally, we can use the height of point A and the distance from point A to point B to find the height of point B (the height of the antenna).
h = d \cdot tan(46^{\circ})
h \approx 25.7 \cdot tan(46^{\circ})
h \approx 23.2
Therefore, the height of the antenna is approximately 23.2 meters.
Step-by-step explanation:
the scenario creates 2 right-angled triangles.
both have the same first leg : the horizontal distance from Avani's eyes to the building (21 m).
and both have a right angle (90°) at the point, where the horizontal distance meets the building.
the difference is now the second leg : the height of the building (starting at 1.66 m above ground), and the height of the building plus the height of the antenna (again starting at 1.66 m above ground).
another difference is the length of the line of sight (from Avani to AA, and from Avani to BB).
driving these differences is the difference in the angle at Avani (38° vs. 46°).
now, remember the law of sine :
a/sin(A) = b/sin(B) = c/sin(C)
a, b, c are the sides of the triangle, A, B, C are the corresponding opposite angles of the triangle.
and remember : the sum of all angles in a triangle is always 180°.
what is the plan ?
we need to calculate the second leg of the larger triangle, and then the second leg of the smaller triangle and subtract that from the second leg of the larger triangle.
in other words :
(building + antenna) - building = antenna
so, we start with the larger triangle (up to BB).
the angle at Avani is 46°.
the angle at the building is 90°.
the angle at BB is then
180 - 90 - 46 = 44°.
21/sin(44) = (building + antenna)/sin(46)
(building + antenna) = 21×sin(46)/sin(44) =
= 21.74613659... m
now, for the smaller triangle (up to AA).
the angle at Avani is 38°.
the angle at the building is 90°.
the angle at AA is then
180 - 90 - 38 = 52°.
21/sin(52) = building/sin(38)
building = 21×sin(38)/sin(52) = 16.40699816... m
the height of the antenna is then again
(building + antenna) - building = 5.339138433... m
≈ 5.3 m
What is the solution of x-1/x^2 +5x+4 less than or equal to 0
Answers
Answer:
[tex]x-1/x^2 +5x+4[/tex] = no real value
Step-by-step explanation:
Step 1 : Multiply through by x^2
[tex]x^{2} -1 +5x^{3}+ 4x^{2}[/tex]
Step 2 : Collect like terms
[tex]5x^{3}+5x^{2} -1\geq 0[/tex]
Step 3 : Ignore the sign and solve for x
[tex]5x^{3} +5x^{2} -1 = 0\\x =0.380609458\\x= 0.4(2dp)[/tex]
Step 4 : Input back into the equation
Step 5: This shows that x-1/x^2 +5x+4 has no real values.
The function g(x) is shown on the graph.
What is the equation of g(x) in vertex form?
g(x) = (x − 4)2 − 3
g(x) = (x − 4)2 + 3
g(x) = (x + 4)2 − 3
g(x) = (x + 4)2 + 3
Answers
Answer:
The correct answer is g(x) = (x+4)2+3
Step-by-step explanation:
The graph is sifted 3 units up and 4 units left.
I need help with the graph about it increasing and decreasing!!
Answers
Answers:
Increasing: [tex](-1.5, 2)[/tex]
Decreasing: [tex](-\infty,-1.5) \cup (2,\infty)[/tex]
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Explanation:
A function curve is considered increasing when moving uphill as you move to the right.
We're going uphill on the interval [tex]-1.5 < \text{x} < 2[/tex] which translates to the interval notation [tex](-1.5, 2)[/tex]. Be sure not to confuse this with ordered pair notation which unfortunately looks identical. The curved parenthesis are used to exclude each endpoint.
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When moving to the right, we go downhill on two separate regions:
When x < -1.5, aka [tex]-\infty < \text{x} < -1.5[/tex]When x > 2, aka [tex]2 < \text{x} < \infty[/tex]The first portion translates to the interval notation [tex](-\infty,-1.5)[/tex]
The second portion translates to [tex](2,\infty)[/tex]
We glue those regions together with a union symbol to get [tex](-\infty,-1.5) \cup (2,\infty)[/tex]
The union symbol basically means "or" when it comes to interval notation. So we are decreasing on the interval [tex](-\infty,-1.5)[/tex] or decreasing on the interval [tex](2,\infty)[/tex]