Anju earned $30 by doing 10 chores. So, if Anju does 10 chores, she can earn money up to $30?
What is an equation?An equation is a mathematical statement that indicates the equality of two expressions. It is made up of one or more variables, constants, and mathematical operations. An equation consists of two sides, left-hand side (LHS) and right-hand side (RHS), separated by an equal sign (=).
The purpose of an equation is to find the value(s) of the variable(s) that satisfy the given conditions. To solve an equation, we need to isolate the variable on one side of the equation and simplify the other side of the equation until we obtain a solution or solutions.
The equation shows that the amount of money Anju earns is directly proportional to the number of chores she does. Each chore is worth $3, so if Anju does c chores, she earns 3c dollars.
For example, if Anju does 5 chores, she can use the equation to find how much money she earned:
3c = d
3(5) = d
15 = d
So, Anju earned $15 by doing 5 chores.
Similarly, if Anju does 10 chores, she can use the same equation to find her earnings:
3c = d
3(10) = d
30 = d
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Answer: independent variable Dependent variable
if you’re on khan it’s all right MARK AS BRAINLIEST PLS
Which mathematical word describes both 2.25
and 6.75
in the expression 2.25x+6.75x−5.5
?
Answer:
Coefficient, the coefficient is the number before the variable
Step-by-step explanation:
The mathematical word that describes both 2.25 and 6.75 in the expression 2.25x + 6.75x - 5.5 is "coefficients."
What is an expression?An expression contains one or more terms with addition, subtraction, multiplication, and division.
We always combine the like terms in an expression when we simplify.
We also keep all the like terms on one side of the expression if we are dealing with two sides of an expression.
Example:
1 + 3x + 4y = 7 is an expression.
3 + 4 is an expression.
2 x 4 + 6 x 7 – 9 is an expression.
33 + 77 – 88 is an expression.
We have,
In this expression,
2.25 and 6.75 are coefficients of the variables x, which means that they multiply the variable x.
The term 5.5 is a constant because it does not contain a variable.
Thus,
The mathematical word that describes both 2.25 and 6.75 in the expression 2.25x + 6.75x - 5.5 is "coefficients."
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The formula d=b2−4ac is used to calculate the discriminant.
Solve for b.
A) b=±2ac−d−−−−−√
B) b=±d+4ac−−−−−−√
C) b=±d−4ac−−−−−−√
D) b=±4ac−d−−−−−−√
The formula d=b2−4ac when solved for b = ± [tex]\sqrt{d +4ac}[/tex]. Option B
What is subject of formula?Subject of formula is defined as a variable that is being solved for in an equation.
It is the variable that is made to stand out in an equation. It is the variable that is made to stand alone on one end of the equality sign.
From the information given, we have that;
d=b2−4ac
Now, collect the like terms
d + 4ac = b²
Find the square root of both sides, we have that;
b = [tex]\sqrt{d + 4ac}[/tex]
Insert the plus-minus sign to show the interval, we have;
b = ± [tex]\sqrt{d +4ac}[/tex]
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1.1.1 To determine how much grass seeds they will need, the caretaker measure the length and breadth of the area of the sports field. He measured the length to be 162m and the breadth 160m. Calculate the area where the grass will be planted. You may use the formula: Area of rectangle = length x breadth (2)
Answer:
the area where the grass will be planted is 25,920 square meters.
Step-by-step explanation:
To calculate the area where the grass will be planted, we need to multiply the length and breadth of the sports field.
Area = length x breadth
Area = 162m x 160m
Area = 25,920 square meters
Therefore, the area where the grass will be planted is 25,920 square meters.
Solve to find the value of ‘a’ 10a-2=4a-1a
Answer: a = [tex]\frac{2}{7}[/tex].
Step-by-step explanation:
10a - 2 = 4a - 1a
10a - 2 = 3a
10a -2 + 2 = 3a + 2
10a = 3a + 2
10a - 3a = 3a -3a + 2
7a = 2
a = [tex]\frac{2}{7}[/tex]
What is the approximate value of this logarithmic expression?
The approximate value of the given logarithmic expression as required to be determined in the task content is; 1.528.
What is the value of the logarithmic expression as required?It follows from the task content; it is required that the value of the logarithmic expression is to be determined.
Therefore, we have;
let the result of the expression be x; so that we have;
log₈ (24) = x
x log (8) = log (24)
x = log (24) - log (8)
x = 1.528
Ultimately, the approximate value of the logarithmic expression in discuss is; 1.528.
Complete question: The correct expression is; log₈ (24) .
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Rachel worked 36 hours last month and earned $7 per hour. She spent $15 of earnings since then. How much money does she have left?
Answer:
(36 × $7) - $15 = $252 - $15 = $237
You can compare quantities more easily using properties of exponents. For example, you can use exponent properties to compare the weights of 3,124-lb mother hippopotamus and there 125-lb baby. When else might you want to use exponent properties
Exponential property can be used in various field or place like growing or decline of population, bacteria growth/decay , compound interest any many more.
What is Exponential property?Exponential property states that when we multiply two power with same base we add the exponents.
[tex]a^{m} *b^{n } = (a*b)^{m + n}[/tex]
When we divide two power with same base we subtract the exponents.
[tex]a^{m} \div b^{n} = (a \div b)^{m-n}[/tex]
When have to find the power of power we multiply the exponents.
[tex](a^{m} )^{n} = a^{m*n}[/tex]
Three most important use of exponential function is to calculate carbon dating of any soil, fossil foil etc, to calculate population growth , interest earn on an investment etc.
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Choose all of the equations that have infinitely many solutions.
A. 3 (x + 4) = 2x - 7
B. 3x+8-x=3+5+2x
c. (4x − 8) = 2x − 4 + 12
D. 5-4x+7= −2 (2x - 6)
E. 4-3x - 8 = 2x + 7 - 5x
Equations that have infinitely many solutions are:
B. 3x+8-x=3+5+2x
D. 5-4x+7= −2 (2x - 6)
How to find the equations with infinitely many solutions?An equation has infinitely many solutions when you try to solve the equation and you get a variable or a number equal to itself.
A. 3 (x + 4) = 2x - 7
3x + 12 = 2x - 7
3x -2x = -7 -12
x = -19
B. 3x+8-x=3+5+2x
3x -x - 2x =3 + 5 - 8
0 = 0
This equation has infinitely many solutions.
C. (4x − 8) = 2x − 4 + 12
4x − 2x = − 4 + 12 + 8
2x = 16
x = 8
D. 5-4x+7= −2 (2x - 6)
5 - 4x + 7 = −4x + 12
-4x + 4x = 12 - 7 - 5
0 = 0
This equation has infinitely many solutions.
E. 4-3x - 8 = 2x + 7 - 5x
-3x - 2x + 5x = 7 + 8 - 4
0 = 11
Therefore, options B and D has infinitely many solutions.
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Solve for x.
0≤3x-6≤18
A 0≤x≤8
B 2≤x≤8
C x≤0 orx≥8
D x≤2 or x ≥8
Answer:
B) 2≤x≤8.
Step-by-step explanation:
Add 6 to all sides of the inequality.
0+6≤3x-6+6≤18+6
6≤3x≤24
Divide all sides by 3.
2≤x≤8
The correct answer is B) 2≤x≤8.
What are some mistakes when solving a 2 step equation with a single variable
Answer:Not dividing the entire side of the equation.
Not distributing properly using F.O.I.L.
Confusing the rules for adding and subtracting negative numbers with the rules for multiplying and dividing negative numbers.
Multiplying exponents with the base.
Step-by-step explanation:
Please answer questions 1-6. They are not multiple choice and they are not linked together.
The perimeter of the triangle will be 36.
The value of x in the triangle will be 101°.
The value of y will be 3x
How to calculate the valuesIt should be noted that the total sum of the angles that are in a triangle is 180°. It should be noted that the triangle is a Equilateral Triangle. In this case, since one of the sides is 12, the perimeter will be:
= 12 + 12 + 12
= 36
The value of x in the triangle will be:
= 180° - (22 + 57)
= 180° - 79°
= 101°.
The value of y will be 3x as vertically opposite angles are equal.
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A student has x sweets.she gives 20 to her friends. if one third of the remainder is equal to one fifth of the original number of sweets,find the original number of sweets
Answer:
50 sweets
Step-by-step explanation:
Let's work through the problem step by step:
The student starts with x sweets.
She gives away 20 sweets to her friends, so she is left with (x - 20) sweets.
One third of the remainder is equal to one fifth of the original number of sweets. In other words, (1/3)(x - 20) = (1/5)x.
To solve for x, we can start by multiplying both sides of the equation by 15 (the least common multiple of 3 and 5) to eliminate the fractions:
5(x - 20) = 3x
5x - 100 = 3x
2x = 100
x = 50
Therefore, the original number of sweets was 50.
I need help PLSS. please show the method too :)
Since the distance was measured to the nearest metre, the upper bound for the distance is 101 metres.
What width is correct to the nearest cm?1. To calculate the lower bound for Kelly's average speed, we need to divide the lower bound distance by the upper bound time. Since the distance was measured to the nearest metre, the lower bound for the distance is [tex]99[/tex] Metres.
Since the time was measured to the nearest hundredth of a second, the upper bound for the time is [tex]10.53[/tex] seconds. Therefore, the lower bound for Kelly's average speed is:
[tex]99/10.53 = 9.411[/tex] metres per second (to three decimal places)
2. To calculate the upper bound for the perimeter of the regular hexagon, we need to multiply the upper bound length of a side by 6.
Since the length was measured to the nearest millimetre, the upper bound for the length is [tex]3.601 cm[/tex] (since 3.6005 cm would round up to 3.601 cm). Therefore, the upper bound for the perimeter is:
[tex]6 x\times3.601 = 21.606 cm[/tex] (to three decimal places)
3. To calculate the upper bound for the area of the rectangle, we need to multiply the upper bounds for the length and width. Since the length is correct to the nearest cm, the upper bound for the length is 35.5 cm (since 34.5 cm would round up to 35 cm).
Since the width is correct to the nearest cm, the upper bound for the width is 26.5 cm (since 25.5 cm would round up to 26 cm). Therefore, the upper bound for the area is:
[tex]35.5 \times 26.5 = 942.25 cm^2[/tex] (to two decimal places)
4. To calculate the lower bound for Kelly's average speed, we need to divide the upper bound distance by the lower bound time.
Since the time was measured to the nearest hundredth of a second, the lower bound for the time is 10.51 seconds. Therefore, the lower bound
(d) To calculate the lower bound for Kelly's average speed, we need to divide the lower bound of distance by the upper bound of time.
The lower bound of distance is 99.5m (since the measurement was rounded down to the nearest metre).
The upper bound of time is 10.525s (since the measurement was rounded up to the nearest hundredth of a second).
So, the lower bound for Kelly's average speed is:
speed = distance / time [tex]= 99.5 / 10.525 = 9.45260637[/tex] ...
We need to round this to two decimal places to match the precision of the time measurement, giving us:
speed = [tex]9.45 m/s[/tex]
Therefore, the figures on the calculator display are: 99.5 ÷ 10.525 = 9.45260637... ≈ 9.45.
The length of the rectangle is measured as 645 mm correct to the nearest 5 mm. This means that the actual length could be anywhere between 642.5 mm and 647.5 mm (since rounding up or down depends on the decimal value being greater or less than 0.5 respectively).
Similarly, the width of the rectangle is measured as 400 mm correct to the nearest 5 mm. This means that the actual width could be anywhere between 397.5 mm and 402.5 mm.
5. To calculate the lower bound for the area of the rectangle, we need to find the product of the smallest possible length and width.
Smallest possible length [tex]= 642.5 mm[/tex]
Smallest possible width [tex]= 397.5 mm[/tex]
Area = length x width
Lower bound for area = [tex]642.5 mm x 397.5 mm = 255542.5 mm²[/tex]
Rounding this off to 3 significant figures, we get the final answer as 2.56 x 10^5 mm².
Therefore, the lower bound for the area of the rectangle is [tex]2.56 x 10^5[/tex] mm².
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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.
The rock will be 125 feet above the beach at: The values of t are 3.911 or 1.28 and (b) The minimum height is h= 346 feet
How to find velocity?Velocity is the directional speed of an object in motion as an indication of its rate of change in position as observed from a particular frame of reference and as measured by a particular standard of time
The given parameters are
h = -16t² + 79t + 50
In the equation put h = 125 to find t
125 = -16t² +79t+50
Rearrange the equation to have
16t²-79t -50 +125 = 0
this is also written as 16t² -79t + 75 =0
Solving for t we have
[-b±√b²-4ac]/2z
[79 ±√79²-4*16*75]/2*16
[(79 ±√6241-4800)] / 32
Simplify further to get
[79 ±√1441] / 32
(79 ±38) / 32
117/32 or 41/32
The values of t are 3.911 or 1.28
The minimum height of the rock at t = 1.28 is
h = -16(3.28)² + 79( 3.28)+ 50
h = -16(10.7584) + 79(3.28) +50
h = - 172.1344 +259.12 + 50
h= 346 feet
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Which of the following comparisons is false? 5 degrees centigrade warmer than 5 degrees farenheight or 15 degrees centigrade is cooler than 60 degrees farenheight or 30 degrees centigrade centigrade is warmer than 90 degrees farenheight or 35 degrees centigrade cooler than 100 degrees farenheight ?
The false comparison is: 35 degrees centigrade cooler than 100 degrees Fahrenheit.
What is an expression?In mathematics and computer programming, an expression is a combination of one or more values, variables, operators, and functions that are evaluated to produce a result.
According to the given information:The comparison "35 degrees centigrade cooler than 100 degrees Fahrenheit" is false because 35 degrees centigrade is equivalent to 95 degrees Fahrenheit, which is actually warmer than 100 degrees Fahrenheit. Therefore, it is incorrect to say that 35 degrees centigrade is cooler than 100 degrees Fahrenheit.
Therefore, the false comparison is: 35 degrees centigrade cooler than 100 degrees Fahrenheit.
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if anyone can help id appreciate it.
Answer:
YOU HAVE TO USE THE VECTORS AS WELL MATRIX TO GET THE SOLUTION OF THIS QUESTION
Please help i neeeeeeeeeeed iiittt
Answer:
C.
Step-by-step:
The measure of angle A is congruent to the measure of angle P.
Please help i’m struggling
The vertices will be D = (-3,2) E=(1,2) F=(-2,0).
What is dilatiοn?resizing an οbject is accοmplished thrοugh a change called dilatiοn. The οbjects can be enlarged οr shrunk via dilatiοn. A shape identical tο the sοurce image is created by this transfοrmatiοn. The size οf the fοrm dοes, hοwever, differ. A dilatatiοn οught tο either extend οr cοntract the οriginal fοrm. The scale factοr is a phrase used tο describe this transitiοn.
The scale factοr is defined as the difference in size between the new and οld images. An established lοcatiοn in the plane is the center οf dilatatiοn. The dilatiοn transfοrmatiοn is determined by the scale factοr and the centre οf dilatiοn.
Here the scale factοr is 1/2
Sο the vertices will be D = (-3,2)
E=(1,2)
F=(-2,0)
Hence the vertices will be D = (-3,2) E=(1,2) F=(-2,0).
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Is -x=y proportional
Answer:
no
Step-by-step explanation:
what Is an array because it's kinda hard I'm in elementary school and I'm on 4th grade but it's very hard .
Answer: An array is a collection of items of same data type stored at contiguous memory locations.
Step-by-step explanation: There you go dude happy to help
Help please !!
The volume of a fixed amount of a gas varies directly as the temperature 7 and inversely as the pressure P. Suppose that I'-70 cm³ when 7-420 kelvin
kg
kg
and P-18-
Find the temperature when
is 60 cm and P-7
X
Answer:
420 K x (60 cm³ / 70 cm³) x (7 / 18) = 294.29 K
Step-by-step explanation:
Match the term to the correct definition.
Question 2 options:
The military alliance of the USA, Britain, France, and other countries during WWII
the front lines where combat between opposing armies occurs
Germany, Italy, Japan
ideas or statements spread to promote one side's views and present an opposing side negatively.
an economic system characterized by private or corporate ownership of capital goods
1.
Propaganda
2.
Front
3.
free enterprise system
4.
Allied Forces
5.
Axis Powers
Answer:
Propaganda: ideas or statements spread to promote one side's views and present an opposing side negatively.
Front: the front lines where combat between opposing armies occurs.
Free enterprise system: an economic system characterized by private or corporate ownership of capital goods.
Allied Forces: the military alliance of the USA, Britain, France, and other countries during WWII.
Axis Powers: Germany, Italy, Japan.
Find (f.g)(x) for f(x) = 4x - 9 and g(x)=3x^2. Show all work for full credit.
Answer:
The answer is (f.g)(x) = 12x^2 - 9.
Step-by-step explanation:
To find (f.g)(x), we need to apply the composition of functions formula, which is:
(f.g)(x) = f(g(x))
First, we need to find g(x):
g(x) = 3x^2
Now, we need to plug g(x) into f(x) in place of x:
f(g(x)) = 4(g(x)) - 9
= 4(3x^2) - 9
= 12x^2 - 9
Therefore, (f.g)(x) = 12x^2 - 9.
Hope this helps, I'm sorry if it doesn't! If you need more help, ask me! :]
Someone help I’ll mark BRAINLIEST
Answer:
1. c
2. b
3. B
Step-by-step explanation:
1. the hypotenuse is the longest side of the triangle.
2. think of it as the leg that helps form angle A (or forms right angle) that is NOT the hypotenuse
3. if "c" is the hypotenuse,, & b is the adjacent leg,, the opposite angle is across from the given angle which in this case is A
Which is a feature of function g if g(x) = f(x+4) +8
The features of the given function are;
y-intercept at (0,10)
vertical asymptote of x = -4
How to find the feature of a function?A function is a relation in which each possible input value leads to exactly one output value. We say “the output is a function of the input.” The input values make up the domain, and the output values make up the range.
The function is given as;
g(x) = f(x + 4) + 8
The domain of a function is a set of all possible input values while the range of a function is defined as a set of all possible output values.
A vertical asymptote of a graph is a vertical line x = a where the graph tends toward positive or negative infinity as the inputs approach a.
Thus, vertical asymptote is x = -4.
The he feat will be at (0, 10)
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two angles in a triangle are 38 and 122.write and sole an addition equation to determine the measure of the third angle c
The measure οf the third angle c is 20 degrees.
What is triangle angle sum prοperty?The triangle angle sum prοperty states that the sum οf the three interiοr angles οf a triangle is always equal tο 180 degrees. This prοperty hοlds true fοr all types οf triangles, whether they are acute, οbtuse, οr right-angled. The prοperty can be expressed as fοllοws:
Angle A + Angle B + Angle C = 180 degrees, where A, B, and C are the measures οf the interiοr angles οf the triangle.
38 + 122 + c = 180
Tο sοlve fοr c, we can simplify the left side οf the equatiοn:
160 + c = 180
Subtracting 160 frοm bοth sides, we get:
c = 20
Therefοre, the measure οf the third angle c is 20 degrees.
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Complete question:
Two angles in a triangle are 38° and 122°. Write the angle sum property to determine the measure of the third angle ∠c.
[Hint: Angle sum property = ∠a+ ∠b+ ∠c = 180°]
Use the vertex to find the general form equation on the quadratic function
The general form of the equation of this quadratic function is f(x) = x² - 2x + 1.
What is a quadratic equation?In Mathematics, the standard form of a quadratic equation is represented by the following mathematical equation;
ax² + bx + c = 0
Based on the information provided about this quadratic equation, it comprises the following ordered pairs;
Center (h, k) = (1, 0),
(x, y) = (0, 1).
By substituting the ordered pairs into the standard form of a quadratic equation, we have:
f(x) = a(x - h)² + k
1 = a(0 - 1)² + 0
1 = a
Therefore, the required quadratic equation is given by:
f(x) = 1(x - 1)² + 0
f(x) = (x - 1)(x - 1)
f(x) = x² - x - x + 1
f(x) = x² - 2x + 1
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A ball is thrown directly with an initial speed of 7.30 m/s from a height of 2.91. After what time intervals does it strike the ground?
The ball strikes the grοund after apprοximately 1.07 secοnds.
What is Time, Speed and Distance?Time: a measured οr measurable periοd during which an actiοn, prοcess, οr cοnditiοn exists οr cοntinues.
Speed: the rate at which sοmething mοves, οperates, οr happens.
Distance: the amοunt οf space between twο pοints οr οbjects.
We can sοlve this prοblem using the kinematic equatiοns οf mοtiοn. We knοw the initial velοcity (u = 7.30 m/s), the initial height (h = 2.91 m), and we want tο find the time taken fοr the ball tο hit the grοund (t).
Let's use the kinematic equatiοn that relates the final pοsitiοn (s), initial pοsitiοn (h), initial velοcity (u), acceleratiοn (a), and time (t):
[tex]s = h + ut + (1/2)at^2[/tex]
Since the ball is thrοwn vertically dοwnwards, the acceleratiοn is [tex]-9.81 m/s^2[/tex] (negative because it is in the οppοsite directiοn tο the initial velοcity).
At the mοment the ball hits the grοund, its final pοsitiοn s is zerο. Therefοre, we can rewrite the equatiοn as:
[tex]0 = h + ut + (1/2)at^2[/tex]
Solving for t, we get:
[tex]t = [-u\±\sqrt{(u^2 - 2ah)} ] / a[/tex]
We take the positive solution, since time cannot be negative. Substituting the values we get:
[tex]t = [ -7.30 \± \sqrt{((7.30)^2 - 2(-9.81)(2.91))} ] / (-9.81)[/tex]
[tex]t = [ -7.30 \± \sqrt{ (53.25)} ] / (-9.81)[/tex]
t ≈ 1.07 s οr t ≈ 0.31 s
The negative sοlutiοn dοesn't make physical sense in this cοntext, sο we discard it. Therefοre, the ball strikes the grοund after apprοximately 1.07 secοnds.
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Solve for y when x = -8. k=-5 y = [?] Remember: y=kx
I have about 10 minutes pls help
In triangles ABC and PQR, the ratio of the measure of side AB and side PQ is 2 : 3 and the ratio of the measure of sides BC and QR is 2 : 3. Thus, AB/PQ = BC/QR. Also, the m∠B = m∠Q. The ratio of two pairs of corresponding sides is congruent and the included angle is equal. Hence, ΔABC ~ ΔPQR by SAS similarity theorem.
What is SAS similarity theorem?SAS similarity theorem is a theorem in geometry that stands for "Side-Angle-Side Similarity Theorem".
This theorem states that if two triangles have two pairs of corresponding sides that are proportional in length, and the included angles between these sides are congruent (have the same measure), then the two triangles are similar.
We can see that examining the two triangles, it is clear that it is in line with SAS similarity theorem.
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