QUESTION SIX Solve the following problems: (a) Find the gradient, x and y intercepts of 3x + 4y + 12 = 0. Sketch the graph. (6 Marks) (b) Find the gradient, x and y intercepts of the line I, passing through the points P (-1,4) and Q (3,0). Sketch the graph. (6 Marks) (c) A line 1₂ is perpendicular to 4. Find its gradient. (2 Marks) (14 Marks)
Answers
The sketches of the graphs are added as an attachment and the gradient of the perpendicular line l₂ is 1
Finding the gradient, x and y interceptsGiven that
3x + 4y + 12 = 0
Set x = 0 to determine the y-intercept
4y + 12 = 0
So, we have
y-intercept = -3
Set y = 0 to determine the x-intercept
3x + 12 = 0
So, we have
x-intercept = -4
For the gradient, we make y the subject in 3x + 4y + 12 = 0.
y = -3/4x - 12/4
y = -3/4x - 3
So, the gradient is -3/4
The sketch of the graph is attached.
Finding the gradient, x and y interceptsHere, we have the points P (-1,4) and Q (3,0).
The gradient is
gradient = (0 - 4)/(3 + 1)
gradient = -1
From the point, we have
x-intercept = 3
For the y-intercept, we have
(0 - 4)/(3 + 1) = (y - 4)/(0 + 1)
(y - 4)/(0 + 1) = -1
y - 4 = -1
y-intercept = 3
So, the equation is
y = -x + 3
The sketch of the graph is attached.
Finding the gradient of l₂We understand that l₂ is perpendicular to l
The gradients of perpendicular lines are
Gradient 1 = -1/Gradient 2
So, we have
l₂ = -1/-1
Evaluate
l₂ = 1
Hence, the gradient of line l₂ is 1
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Related Questions
Directed line segment PQ has endpoint P (-8,-4) and Q (4,12). Determine the point that partitions the directed line segment in a ratio of 3
Answers
The directed line segment PQ is divided at this point at a 3:1 ratio (1, 8)
According to the section formula, the coordinates of a point R may be determined by dividing a line segment PQ by that point in the ratio m:n as follows:
[tex]R_x = (n * Px + m * Qx) / (m + n)\\R_y = (n * Py + m * Qy) / (m + n)[/tex]
where [tex]P_x, P_y[/tex] are the coordinates of point P, and [tex]Q_x, Q_y[/tex] are the coordinates of point Q.
In this case, we want to divide the line segment PQ in a ratio of 3:1. This means that m = 3 and n = 1.
Using the formula, we can find the coordinates of the point R that divides PQ in a 3:1 ratio:
Rx = (1 * (-8) + 3 * 4) / (3 + 1) = 1
Ry = (1 * (-4) + 3 * 12) / (3 + 1) = 8
Therefore, the point that partitions the directed line segment PQ in a ratio of 3:1 is (1, 8).
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what point on number line is 7/9 the way from the point -3.6 to the point 10?
Answers
The point on the number line that is 7/9 of the way from -3.6 to 10 is approximately 6.97777777778.
To find the point on the number line that is 7/9 of the way from -3.6 to 10, we can use the following formula:
Point = Starting point + (Fraction of distance) x (Total distance)
In this case, the starting point is -3.6, the total distance is the distance from -3.6 to 10 (which is 10 - (-3.6) = 13.6), and the fraction of distance is 7/9.
Plugging in these values, we get:
Point = -3.6 + (7/9) x (13.6)
Simplifying,
Point = -3.6 + (7/9) x (13.6)
Point = -3.6 + 9.9556
Point = 6.97777777778
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Brooklyn needs to earn $14 more dollars to have $32. How much money does Brooklyn have now?
Identify the steps needed to write and solve an equation to solve the word problem. Select all that apply.
The variable, m, is equal to the amount of money Brooklyn has now.
The variable, m, is equal to the amount of money Brooklyn needs to earn.
The correct equation is 14 + m = 32.
The correct equation is 14m = 32.
To solve the equation, subtract 14 from both sides.
To solve the equation, divide 14 on both sides.
Answers
Answer:
A,C,E
Step-by-step explanation:
Answer:
a and c and e
Step-by-step explanation:
got it right on my home work
Classify the triangle described below.
A triangle with measures of x°, 4x°, and 4x° is a(n) triangle.
Answers
We can see that the triangle has two equal angles, then it is an isosceles triangle.
How to classify the triangle?Here we have a triangle where we know that the interior angles are:
x°, 4x°, and 4x°
remember that the sum of the interior angles of any triangle is 180°, then we can write the linear equation:
x + 4x + 4x = 180
Solving that for x we will get:
9x = 180
x = 180/9
x = 30
Then the angles are:
x° = 20°
4x° = 80°
4x° = 80°
We can see that we have two equal angles, then the triangle is an isosceles triangle.
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Can you please help with this question i dont understand thank you.
Answers
1. Cost is proportional to Area includes;
-Carpeting that cost $22 for every 3 square yard
-Cost ($) and Area (ft^2) table
-Mulch that cost a set amount to cover a square foot
2. Cost is not proportional to Area;
- Linear graph
- Asphalt sealant that is quoted at a set price per square foot, plus a labor fee
3. Not enough information
- A wood deck quoted at a bulk cost for 25 square feet.
Why is the Linear graph not proportional to area?The Linear graph is not proportional to the area looking at the coordinates that has been provided. The cost to the yard area does not have a consistent progression. By this, $1,600 should cove 60 yd² instead of 80
The above answer is based on the information provided in the picture as seen below;
Drag each object to show whether cost is proportional to area in the situation represented.
Cost is proportional to Area Cost is not proportional to Area Not enough information
a. A wood deck quoted at a bulk cost for 25 square feet.
d. Asphalt sealant That is quoted at a set price per square foot, plus a labor fee.
c. Carpeting that cost $22 for every 3 square yard
d. Mulch that cost a set amount to cover a square foot
e. Cost ($) Area (ft^2)
500 400
750 600
1000 800
f. A cost ($) and area (yd^2) that has coordinates (0, 0), (20, 1200) (80, 1600)
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Give two pairs of polar coordinates for the point (0, -10)
Answers
The required two pairs of polar coordinates for the point (0, -10) are:
(10, π/2) and (10, -π/2)
To convert from Cartesian coordinates (x, y) to polar coordinates (r, θ), we can use the following formulas:
[tex]r = \sqrt{(x^2 + y^2)}\\\theta = \tan^{-1}(y/x)[/tex]
Since the x-coordinate of the point (0, -10) is 0, we can directly say that the angle θ is either π/2 or -π/2, depending on whether y is positive or negative.
For y = -10, we get:
[tex]r = \sqrt{(0^2 + (-10)^2)} = 10[/tex]
Therefore, two pairs of polar coordinates for the point (0, -10) are:
(10, π/2) and (10, -π/2)
Both of these pairs have the same distance from the origin (r = 10) but different angles (π/2 and -π/2).
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Given PQ|| BC, what is PB?
9.6 units
10 units
13 units
14 units
Answers
Using the triangle proportionality theorem, the length of side PB in the given triangle is 10
Calculating the length of a side of a triangleFrom the question, we are to determine what the length of PB is in the given triangle
From the Triangle Proportionality Theorem which states that "If a line parallel to one side of a triangle intersects the other two sides of the triangle, then the line divides these two sides proportionally".
Thus,
From the given diagram, we can write that
AP / PB = AQ /QC
From the given information,
AP = 4
AQ = 6
QC = 15
4 / PB = 6 / 15
6 × PB = 4 × 15
6 × PB = 60
Divide both sides by 6
PB = 60 / 6
PB = 10
Hence, the length of PB is 10
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please help me!!!!!!
Answers
The line of reflection of the given image is:
A reflection across y = -3
What is the Line of Reflection?A line of reflection is a line that lies between two identical mirror images, so the distance of any point of one figure from the line will equal the distance of the same point of the mirror image (flipped figure).
The definition above tells us that if we are given two images, such as mirror images of each other, the line of reflection can be determined by calculating the midpoint from any two points of the figures.
Looking at the given image, the center point of the mirror images is seen as y = -3
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can someone help me pls it Ricardo has made 4 out of the 12 recipes in his cookbook. What fraction of the recipe has he made? and thank you
Answers
Yes, of course!
Ricardo has made 4 out of the 12 recipes in his cookbook.
To find out what fraction of the recipes he has made, you can write it as a fraction:
4/12
To simplify this fraction, you can divide both the numerator and denominator by 4, which gives:
4/12 = 1/3
Therefore, Ricardo has made 1/3 of the recipes in his cookbook.
What is the image of ( − 5 , − 9 ) after a dilation by a scale factor of 3 centered at the origin?
Answers
Can you help me with this question?
A Ferris wheel has a diameter of 14 meters determine the distance to the nearest meter that a rider travels after 2 complete laps.
Answers
Answer:
88
Step-by-step explanation:
The distance traveled by a rider on a Ferris wheel can be calculated by finding the circumference of the wheel and then multiplying it by the number of complete laps.
The formula for the circumference of a circle is:
C = πd
where C is the circumference, d is the diameter, and π is a constant approximately equal to 3.14.
In this case, the diameter of the Ferris wheel is 14 meters, so the radius (half the diameter) is 7 meters.
C = πd = π(14) = 43.9823 meters (rounded to 4 decimal places)
To find the distance traveled after 2 complete laps, we need to multiply the circumference by 2:
distance = 2C = 2(43.9823) = 87.9646 meters
Rounding to the nearest meter, the distance traveled by a rider after 2 complete laps is 88 meters.
Substituting the given value, we have:
C = π(14) = 43.9823 meters (rounded to four decimal places)
After one complete lap, the rider travels the entire circumference of the Ferris wheel.
After two complete laps, the rider travels twice the circumference.
Therefore, the distance to the nearest meter that the rider travels after 2 complete laps is:
2C = 2(43.9823) = 87.9646 meters (rounded to four decimal places)
Rounded to the nearest meter, the rider travels 88 meters after 2 complete laps.
I NEED HELP!!!! I DONT UNDERSTAND WHAT TO DO SO IF YOU COULD SOLVE IT FOR ME THAT WOULD BE GREAT!!! THXXXX
Answers
The measure of the angles are:
∠1 = 90
∠2 = 90
∠3 = 132
We have,
The angle between the tangent and the radius of a circle is 90.
So,
∠1 = 90
∠2 = 90
And,
48 + 90 + 90 + ∠3 = 360 ______(1)
Solve for ∠3 from (1).
48 + 90 + 90 + ∠3 = 360
48 + 180 + ∠3 = 360
∠3 = 360 - 228
∠3 = 132
Thus,
The measure of the angles are:
∠1 = 90
∠2 = 90
∠3 = 132
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Gus has a fish tank that holds
4710
47104710 inches
3
3
cubed of water. He is using a cylinder shaped bucket with a radius of
5
55 inches and a height of
20
2020 inches to fill the tank.
How many times will Gus need to fill the bucket to completely fill the fish tank if he doesn't spill a drop?
Use
3.14
3.143, point, 14 for
π
Answers
Gus will need to fill the bucket 3 times to completely fill the fish tank, assuming he doesn't spill any water.
To find how many times Gus will need to fill the bucket to completely fill the fish tank, we first need to calculate the volume of the bucket. The formula for the volume of a cylinder is:
V = πr²h
where V is the volume, r is the radius, and h is the height.
Substituting the given values into the formula gives:
V = 3.14 x 5² x 20
V = 3.14 x 25 x 20
V = 1570 inches³
Therefore, each time Gus fills the bucket, he will add 1570 inches³ of water to the fish tank. To calculate how many times he needs to fill the bucket to fill the entire fish tank, we can divide the total volume of the fish tank by the volume of the bucket:
4710 / 1570 = 3
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Complete question is:
Gus has a fish tank that holds 4710 inches³ of water. He is using a cylinder shaped bucket with a radius of 5 inches and a height of 20 inches to fill the tank. How many times will Gus need to fill the bucket to completely fill the fish tank if he doesn't spill a drop?
An element with a mass of 640 grams decays by 19.3% per minute. To the nearest
tenth of a minute, how long will it be until there are 50 grams of the element
remaining?
Answers
it will take approximately 6.8 minutes until there are 50 grams of the element remaining.
We can use exponential decay formula to solve this problem:
A = A₀ ×e²(-rt)
where A is the amount of the element remaining, A₀ is the initial amount, r is the decay rate (as a decimal), t is the time elapsed.
We know that the initial mass of the element is 640 grams, the decay rate is 19.3% per minute, and we want to find the time it takes for there to be 50 grams of the element remaining. So we can write:
50 = 640 ×e²(-0.193t)
Dividing both sides by 640, we get:
0.078125 = e²(-0.193t)
Taking the natural logarithm of both sides, we get:
ln(0.078125) = -0.193t
Solving for t, we get:
t = ln(0.078125) / (-0.193)
t ≈ 6.8 minutes
Therefore, it will take approximately 6.8 minutes until there are 50 grams of the element remaining.
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Answer:
Please mark me the brainliest
Let's denote the time in minutes by t, and the mass of the element at time t by m(t). Then we can write an exponential decay equation:
m(t) = m(0) * (1 - r)^t
where m(0) is the initial mass of the element, r is the decay rate as a decimal (19.3% = 0.193), and t is the time in minutes.
We know that the initial mass is m(0) = 640 grams, and we want to find the time t when the mass has decreased to 50 grams. So we can set up the following equation:
50 = 640 * (1 - 0.193)^t
Simplifying:
0.07796875 = 0.807^t
Taking the natural logarithm of both sides:
ln(0.07796875) = ln(0.807^t)
Using the property of logarithms that ln(a^b) = b * ln(a):
ln(0.07796875) = t * ln(0.807)
Dividing both sides by ln(0.807):
t = ln(0.07796875) / ln(0.807)
Using a calculator, we get:
t ≈ 24.9
Therefore, to the nearest tenth of a minute, it will take 24.9 minutes until there are 50 grams of the element remaining.
Step-by-step explanation:
A particular movie theater charges $7.00 per adult and $2.50 per child. If 600 people attended a movie and the total revenue from ticket sales was, which of the following models the given information if x represents the number of adults and y represents the number of children?
Answers
Answer:
Step-by-step explanation:
7x+2.50y=600
Triangle ABC~ Triangle DEF. Find the scale factor from triangle ABC to triangle DEF
Answers
Answer:
To go from ABC to DEF, you have to multiply by 8/9
Step-by-step explanation:
40/45 = 8/9
88/99 = 8/9
80/90 = 8/9
Suppose that a cylinder has a radius of r units, and that the height of the cylinder is also r units. The lateral area of the cylinder is 512π square units. Find the value of r.
Answers
The calculated value of r ihe lateral area of the cylinder is 512π square units is 16 units
Finding the value of r.From the question, we have the following parameters that can be used in our computation:
The lateral area of the cylinder is 512π square units
The lateral area of the cylinder is 2πrh
So, we have
2πrh = 512π
Substitute r for h
2πr^2 = 512π
Divide both sides by 2π
So, we have
r^2 = 256
Take the square roots
r = 16
Hence, the radius is 16 units
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Define your variables, write a system of equations, use your calculator to solve the system of equations and answer the problem.
A grocer sells milk chocolate at $2.60 per pound, dark chocolate at $4.80 per pound, and dark chocolate with almonds at $5.50 per pound. He wants to make a mixture of 50 pounds of mixed chocolates to sell at $4.71 per pound. The mixture is to contain as many pounds of dark chocolate with almonds as milk chocolate and dark chocolate combined. How many pounds of each type must he use in this mixture?
Answers
10 pounds of milk chocolate, 15 pounds of dark chocolate, and 25 pounds of almond chocolate.
We have,
A grocer sells milk chocolate at $2.60 per pound, dark chocolate at $4.80 per pound, and dark chocolate with almonds at $5.50 per pound.
Let x be the pounds of milk chocolate and y is the number of pounds of of dark chocolate.
So, x + y + (x+y)= 50
2(x+y)= 50
x+y = 25
x = 25 - y
Now, 2.6x + 4.8y + 5.5(x+y)= 50(4.71)
2.6x + 5.5x + 4.8y + 5.5y = 235.5
8.1x+ 10.3y = 235.5
8.1(25-y) + 10.3y = 235.5
202.5 - 8.1y + 10.3y = 235.5
2.2y = 33
y = 15
and, x = 10
Thus, 10 pounds of milk chocolate, 15 pounds of dark chocolate, and 25 pounds of almond chocolate.
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Find the missing side of the triangle round your answer to the nearest tenth
Answers
Answer:
x = 6 feet
Step-by-step explanation:
using Pythagoras' identity in the right triangle.
the square on the hypotenuse is equal to the sum of the squares on the other 2 sides, that is
x² + 8² = 10²
x² + 64 = 100 ( subtract 64 from both sides )
x² = 36 ( take square root of both sides )
x = [tex]\sqrt{36}[/tex] = 6 feet
Que tipo de corriente circula por el océano glaciar ártico ??
Answers
Answer:Transpolar Drift Stream y el anticiclónico Beaufort Gyre
Step-by-step explanation:
Need help??? With this question
Answers
Answer:
[tex]28 + y + 36 = 180[/tex]
[tex]64 + y = 180[/tex]
[tex]y = 116[/tex]
One notebook and 2 packs of pencils cost $7.20 two notebooks and 2 packs of paper cost $10.90.How much does 1 pack of paper cost
Answers
Answer:
5.45
Step-by-step explanation:
literally do 10.9/2
Please help with my geometry.
What is the area of the segment?
r = 3m
central angle = 98°
Answers
Area of segment = (1/2) * r^2 * (θ - sinθ)
where r is the radius of the circle and θ is the central angle in radians.
First, convert the central angle from degrees to radians:
98° * (π/180) = 1.71 radians
Then, plug in the values for r and θ into the formula:
Area of segment = (1/2) * 3^2 * (1.71 - sin(1.71))
Area of segment = 4.5 * (1.71 - 0.984)
Area of segment = 4.5 * 0.726
Area of segment = 3.27 square meters (rounded to two decimal places)
Therefore, the area of the segment is approximately 3.27 square meters.
A function, f(x), has degree of 4. If f(x) has 2 complex zeros then how many real zeros does it have?
Answers
If it has 2 complex zeros, then it must have 2 real zeros.
How many real zeros does it have?Remember that the number of zeros that a polynomial of degree N has is also N.
For example in functions like:
f(x) = x^N
We can say that the zero x = 0 has a multiplicity of N, so we have N equal zeros.
Then a polynomial of degree 4 has 4 zeros, if two are complex, then the other two are real zeros.
So we conclude that the answer is 2.
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Whats the slope?
Y=x+5
Answers
Answer:
Step-by-step explanation:
1
Therefore, for the equation y=x+5 , the slope is 1 , and the y-intercept is 5 .
A store sells graph paper in packages of 100 sheets. During a sale, they offer a package that has 25% more sheets for no additional cost.How many sheets are in sale package
Answers
There are 125 sheets in the sale package.
If a regular package of graph paper contains 100 sheets, then a package with 25% more sheets would contain:
100 + (25/100) x 100 = 100 + 25 = 125
So a package with 25% more sheets would contain 125 sheets.
During the sale, the store is offering a package with 25% more sheets for no additional cost.
This means that the sale package contains the same number of sheets as a regular package, plus an additional 25% of that same number of sheets.
To find the number of sheets in the sale package, we can set up an equation:
Number of sheets in sale package = Number of sheets in regular package + 25% of the Number of sheets in the regular package
or
Number of sheets in sale package = 100 + 0.25 x 100
Simplifying,
Number of sheets in the sale package = 100 + 25
Number of sheets in the sale package = 125
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Isaac measured the time it took for some teams to complete an escape room game. He recorded their times in the table below. How many of the teams took less than 20minutes to complete the game? (Image: Image showing mathematical content for the question.)
Answers
32 is the number of teams took less than 20minutes to complete the game
Given that Isaac measured the time it took for some teams to complete an escape room game.
The times were recorded in the table
We have to find the number of teams which are less than 20minutes to complete the game
Number of teams took less than 20 minutes
=8+24
=32
Hence, 32 is the number of teams took less than 20minutes to complete the game.
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the dilation of the figure is 45,000cm3 what is the scale factor of the dilation
Answers
The scale factor of the dilation is 30:1.
We have,
A superhero action figure has a volume of 1500 cm³.
The volume of the dilated figure is 45,000 cm³
Now, the scale factor should be
= 45000/ 1500
= 30 /1
Thus, the scale factor of the dilation is 30:1.
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Which function has the graph shown?
A. y = secx
B. y = sinx
C. y = cotx
D. y = tanx
Answers
Answer:
tanx
Step-by-step explanation:
Let X1, X2, ... be IID with mean . Let So O and Sn {k=1 Xk. Let T be a bounded stopping time for the filtration En 0{X1, ..., Xn}. Prove that E[ST] = uE[T]: First show Sk – ku is a martingale. = (Sr] = EL
Answers
To show that Sk - ku is a martingale, we need to show that it satisfies the two properties of a martingale:
Sk - ku is integrable for all k.
For any k, E[Sk+1 - ku+1 | E0,...,Ek] = Sk - ku.
First, we show that Sk - ku is integrable for all k:
E[|Sk - ku|] = E[|(X1 + ... + Xk) - k|]
= E[|X1 + ... + Xk| - k] (using linearity of expectation)
≤ E[|X1| + ... + |Xk|] + k (by triangle inequality)
= kE[|X1|] + ... + kE[|Xk|] + k (using linearity of expectation)
= kE[|X1|] + ... + kE[|X1|] + k (since Xi are IID)
= kE[|X1|] + k (since there are k terms)
< ∞ (since E[|X1|] is finite)
Therefore, Sk - ku is integrable for all k.
Next, we show that for any k, E[Sk+1 - ku+1 | E0,...,Ek] = Sk - ku:
E[Sk+1 - ku+1 | E0,...,Ek] = E[(X1 + ... + Xk+1) - (k+1) | E0,...,Ek]
= E[(X1 + ... + Xk) + Xk+1 - (k+1) | E0,...,Ek]
= E[(X1 + ... + Xk) - k | E0,...,Ek] + E[Xk+1 | E0,...,Ek]
= Sk - ku + E[Xk+1] (by the martingale property of Sk - ku)
= Sk - ku + u (since the mean of X1, X2, ... is u)
Therefore, Sk - ku is a martingale.
Now, we can use the optional stopping theorem to prove that E[ST] = uE[T]:
By the optional stopping theorem, we have:
E[ST] = E[(Sk - ku)(T - k) + Sku]
= E[(Sk - ku)(T - k)] + E[Sku]
= E[E[(Sk - ku)(T - k) | E0,...,Ek]] + E[Sku] (using law of total expectation)
= E[(Sk - ku)E[T - k | E0,...,Ek]] + E[Sku] (using linearity of expectation)
= E[(Sk - ku)(E[T | E0,...,Ek] - k)] + E[Sku] (using law of total expectation)
= E[(Sk - ku)(T - k)] + E[Sku] (since T is a bounded stopping time)
= E[SkT - kuT - kS + ku] + E[Sku]
= E[SkT] - uE[KT] - kE[S] + ku + E[Sku] (using linearity of expectation)
= uE[KT] - uE[KT] - kE[S] + ku + E[Sku] (using the optional stopping theorem)
= ku + E[S(T-k)]
= ku + E[Sk - k^2] (since T is a stopping time)
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