If y=15 when x=5, find y when x=7, given that y varies directly with x.

Answers

Answer 1

Answer:

when x = 7, y = 21

Step-by-step explanation:

This is about direct variation. If y varies directly with x, then there is a constant  factor of variation, k. The constant of variation can be found by ʸ⁄ₓ

k = ʸ⁄ₓ

k = ¹⁵⁄₅ = 3

Now that we have found k, we simply multiply x by it to find y (this is because y is directly proportional to x). We plug in our x = 7 to find y at this point.

y = 3x

y = 3(7)

y = 21


Related Questions

The ratio of Braydon's number of laps he ran to the time he ran is 6:2. The ratio of Monique's number of laps she ran to the time she ran is 104. Explain why these ratios are not in a proportional relationship.​

Answers

Answer:

They are not in a proportional relationship because Monique's number and time isnt a proportion. Instead it is a whole number. Like Braydon's his is 6:2 that is the correct way to write it.

Step-by-step explanation:

The ratio is not proportion.

What is ratio and proportion?

A ratio is an ordered pair of numbers a and b, written a / b where b does not equal 0. A proportion is an equation in which two ratios are set equal to each other.

Given:

The ratio of Braydon's number of laps he ran to the time he ran is 6:2.

The ratio of Monique's number of laps she ran to the time she ran is 10:4.

The simplest for Braydon is = 6/2 = 3/1

and, the simplest form for Monique = 10/4 = 5/2

As, 3/1 ≠ 5/2

So, the ratio is not proportion.

Learn more about proportion here:

https://brainly.com/question/26974513

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The price of a dress was reduce from $20 to $12. By what percentage was the price of the dress reduced?

Answers

Answer:

40%

Step-by-step explanation:

12$ out of the original 20$ = 12/20

12/20 = .6 (60%)

1=100%

if 12/20 = 60% then 100% - 60% = 40%

$20-40% is $12

hope this helps  somehow

50°
(x + 16)




Please help

Answers

Answer:

50o • (x + 16)

Step-by-step explanation:

it stays the same.

What is the slope-intercept equation for the line below?

A) y = 5/4x - 4
B) y = 4/5x - 4
C) y = -4/5x - 4
D) y = -5/4x - 4​

Answers

Answer:

A) y = 5/4x - 4

Step-by-step explanation:

Slope-intercept formula

y = mx + b, where m = slope, b = y-intercept

Slope formula

m = (y2 - y1)/(x2 - x1)

Given points (on the graph)

(0, -4) and (4, 1)

Slope is:

m = (1 - (-4))/(4 - 0) = 5/4

y-intercept is

-4 as per the first point

So the line is:

y = 5/4x - 4

Correct answer option is: A) y = 5/4x - 4

Answer:

it is a very very easy sum!

Step-by-step explanation:

goooooood afternoon

A ruby ring which normally sells for ​$310 is on sale for ​$217. Find the percent markdown for each ring.

Answers

Answer:

My awnser isss

Step-by-step explanation:

32% my homie

Answer:30%

Step-by-step explanation:

Discount = Original Price (X) discount (X) %/100

Discount = 310 × (30)/100

Discount = 310 x 0.3

You save = $93.00

Write an equation in slope-intercept form of the line with slope −6/5 that contains the point (−5,3)

Answers

Answer:

y=-6/5x-3

Step-by-step explanation:

y-3=-6/5(x+5)

y=-6/5x-3

Sean said that if an item is on sale for 50% off plus an additional 20% off, that is the same as a 70% discount. Megan disagrees. Who is correct? Justify your reasoning.​

Answers

Answer:

Megan is correct because when you take 20% off, you're taking it off the 50%.

Step-by-step explanation:


Jim has 7/10
of the sugar he needs to bake a sheet cake. It takes the same amount of sugar to make 1 sheet cake
as it takes to make 24 cupcakes.
What is the greatest number of cupcakes Jim can make with the sugar he has

A. 16 cupcakes
B. 17 cupcakes
C. 18 cupcakes

Answers

16 cupcakes is the answer
He would have enough to make 16.8 cupcakes so whether you round or not (A or B)

A bus travels at a speed of 40 miles per hour and reaches Hogville in 40 minutes. If a cab takes 35 minutes to reach the same spot, determine the speed at which it traveled.

Answers

Answer:

45.7miles per hour

Step-by-step explanation:

40mins = 2/3 hour

the bus travelled (2/3 x 40) miles = 80/3 miles

the cab took 35 mins (which is 7/12 hour) so it's speed is (80/3)/(7/12) miles/hour = 45.714 miles/hour (5 s.f.)

Is (1, -1) a solution to y = 3x - 4?
Explain.

Answers

(1,-1) is a solution to y=3x-4 because when we plug in 1 for x in the equation we get y=-1. Since x is 1 and y is -1 we can see that the coordinate points (1.-1) are a solution to y=3x-4.

Please Mark me as Brainliest!

Answer:

yes

Step-by-step explanation:

just plug in the point into the equation then simplify

PLZZZZZZ HELP ME!!!!!!!

15 x 5x

Answers

75 are u that dumb boy

Answer: x=0

Step-by-step explanation:

x in (-oo:+oo)

((15*x)/5)*x = 0

3*x^2 = 0 // : 3

x^2 = 0

x = 0

x = 0

13x - 5y (if x = 10 and y = 6)​

Answers

Answer:

13(10) - 5 (6)

130 - 30

= 100

Step-by-step explanation:

You replace the x with 10, and the y with 60 and answer normally

13(30) = 130

5(6) = 30

130 - 30 = 100

The answer would be 130x-30y

Many counties in Texas missed many school days in the fall of 2017 due to hurricanes
that year. A solution for how to make up those
days was to add time to each school day
for a portion of the year. It was decided that in order to make up a 6 hour school day, 10
minutes would be added to each day. How many extended days would be needed to
make up 3 school days?

Answers

Apá me voy bye a mi baby you and you mom me he levantado de mi cama a la

need rn! worth 13 ~ what is the equation of the parabola? 謝謝

Answers

Answer:

Its B.

Step-by-step explanation:

Emath.com- Parabola calculator

PLEASE HELP ME!!!!!!!!!!!!!

Answers

T=43 and he has because it’s science

Q is the midpoint for the points S(11, -6) and T(-1, 10). Find the length of segment QT.
QT=

Answers

Answer:

10

Step-by-step explanation:

QT=ST/2=√(12^2+16^2)/2=10

(WILL GIVE BRAINLIEST TO RIGHT ANSWER) a container holding water is 3/4 full. after pouring out 8 ounces it is half full. How many ounces can it hold? x = # ounces container can hold

Answers

it can hold 32 ounces

Answer:

If x is the number of ounces the container can hold then x = 32

Step-by-step explanation:

The container can hold 32 ounces because if it was 3/4 full and then you poured out 8 ounces then that means there was 2/4 remaining.

Hope this helps!!

I will give brainliest and give 17 points please help!!

Answers

Answer:

1. New England Patriots: (3,-2)

2. Miami Dolphins: (-2,1)

3. Denver Brancos: (4,3)

4. Green Bay Packers: (-1,3)

5. San Franciso 49ers: (-4,-4)

6. Pittsburg Steelers: (2,2)

7. Baltimore Ravens: (3,1)

8. Dallas Cowboys: (4,-3)

9. Oakland Raiders: (-4,2)

10. Washington Redskins: (-3,-1)

When a number x is multiplied by 6, the result is 38.

What is the value of x?

Drag and drop the correct number into the box so that the equation is true.

3/8

8/3

1/16

9/4

16

4/9

help me plz it is 10 pts

Answers

Answer:

8/3

Step-by-step explanation:

i took the quiz

Answer:

6⅓ The answer is not in the options..

Step-by-step explanation:

6x = 38

x = 38÷6

x = 6 ⅓ / 6.33333..

The cost of 2 cups of strawberries is $6. Write an equation for the relationship between the cost and cups os strawberries

Answers

Answer:One equation is x=6/2

Hope this helps

Answer:

the strawberrys are worth $3 per cup.

Step-by-step explanation:

s= $6

Can someone put this into vertex form?
y=x2+24x-15

Answers

Answer:

The vertex form of y = x² + 24x - 15 is y = (x + 12)² - 159

Step-by-step explanation:

The vertex form of the quadratic equation y = ax² + bx + c is

y = a(x - h)² + k, where

a is the coefficient of x²(h, k) are the coordinates of the vertex pointh = [tex]\frac{-b}{2a}[/tex] , where b is the coefficient of xk = y at x = h

Let us use the facts above to solve the question

y = x² + 24x - 15

∵ a is the coefficient of x² and b is the coefficient of x

a = 1 and b = 24

∵ h is the x-coordinate of the vertex point

∵ h = [tex]\frac{-b}{2a}[/tex]

→ Substitute the values of a and b to find h

∴ h = [tex]\frac{-24}{2(1)}=\frac{-24}{2}[/tex]

h = -12

→ To find k substitute y by k and x by h

∵ y = k and x = h

∴ k = (-12)² + 24(-12) - 15 = 144 - 288 - 15

k = -159

∴ The coordinates of the vertex point are (-12, -159)

→ Substitute the values of a, h, and k in the vertex form above

∵ y = 1(x - -12)² + (-159)

→ Remember (-)(-) = (+) and (+)(-) = (-)

y = (x + 12)² - 159

The vertex form of y = x² + 24x - 15 is y = (x + 12)² - 159

Answer:

sure.

Step-by-step explanation:

Eddie deposits $1090 in an account that earns 6% interest compounded annually for 3 years. What is the total interest earned after 3 years? Round to the nearest cent.
A: 196.20
B: 208.20
C: 1286.20
D: 1298.20

Answers

Answer:

Step-by-step explanation:

Eddie deposits $1090 in an account that earns 6% interest compounded annually for 3 years. What is the total interest earned after 3 years? Round to the nearest cent.

A: 196.20

B: 208.20

C: 1286.20

D: 1298.20

-6 = 2/3r solve for r

Answers

r=-9


explanation: because

Answer:

r=9

Step-by-step explanation:

What is the answer to answer to 7m-3m-6<6?

Answers

Answer:

m<3

Step-by-step explanation:

This the answer to the equation.

What is the measure of angle 1?
Write the answer without the degree.

Answers

Answer: 70

90+20=110

180-110=70

I hope this is good enough:

Answer:

70

Step-by-step explanation:

Everything needs to add up to 180. So you have 90 and 20 you will add them and you’ll get 110. Since you want to find the missing measurement you will subtract 180-110 and you’ll get 70. The missing angle is 70. To check: 90+20+70=180

4(2.5)^2x = 4
The value of x?

Answers

Answer:

x=0

Step-by-step explanation:

If x is 0, then 2x becomes 0. (2.5)^0 would then be 1. 4*1 would give 0 so x=0.

On Monday, the temperature was 43°F. On Tuesday, the temperature increased 6°F. On Wednesday, the temperature decreased 13°F. Which integer represents the overall change in temperature from Monday to Wednesday?

Answers

Answer:c Thursday

Step-by-step explanation:

If on Monday, the temperature was 43°F. On Tuesday, the temperature increased by 6°F the overall change in temperature from Monday to Wednesday will be  24°F.

What is an arithmetic operation?

It is defined as the operation in which we do the addition of numbers, subtraction, multiplication, and division. It has basic four operators that are +, -, ×, and ÷.

In mathematics, subtraction is defined as the difference between two quantities. The application of subtraction can be used broadly in different applications to find or solve the problems such as finding differences between two quantities and many more.

It is given that on Monday, the temperature was 43°F. On Tuesday, the temperature increased by 6°F. On Wednesday, the temperature decreased by 13°F.

The overall change in temperature from Monday to Wednesday is found as,

=  43°F  + 6°F  - 13°F

= 24 °F

Thus, if on Monday, the temperature was 43°F. On Tuesday, the temperature increased by 6°F the overall change in temperature from Monday to Wednesday will be  24°F.

Learn more about the arithmetic operation here:

brainly.com/question/20595275

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What is the volume of the prism below?
Aw
2
23
units
$3
3. units
5 units 3
A units 3

Answers

Answer:

V = 3.5 m3

Step-by-step explanation:

length l = 1 m

width w = 2 m

height h = 1.75 m

volume V = 3.5 m3

The property tax on a $60,000 home is $1,500. At this rate what will the property tax be on a home worth $75,000?

Answers

Answer:

The answer is $1,875

Step-by-step explanation:

1. I just divided $60,000 by 2 and $1,500 by 2 and got $30,000:$750

2. I realized I needed to do more so I divided again and got $15,000:$375. Next I added it to the question $60,000 + $15,000 = $75,000

3. So then $1,500 + $375 = $1,875

4. $75,000:$1,875

4. Hope this helps :)

A car travels 120 miles in 3 hours at a constant speed. How long will it take for the car to travel 200 miles?

Answers

Answer:

5

Step-by-step explanation:

To calculate the travel speed per hour, divide 120 by 3. 120/3 = 40 mph. Now to calculate the time it will take to travel 200 miles, divided 200 by 40 mph. 200/40 = 5

Answer:5

Step-by-step explanation:

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