1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Pavel [41]
3 years ago
13

If y varies directly with x, and y = 2 when x = −4, what is the value of y when x = 20 ?

Mathematics
2 answers:
balu736 [363]3 years ago
8 0

Answer:

y=kx

2=k.-4

k=-1/2

then

y=-1/2×20

y=-10

ASHA 777 [7]3 years ago
6 0

Answer:

y = - 10

Step-by-step explanation:

Given that y varies directly with x then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition y = 2 when x = - 4, that is

2 = - 4k ( divide both sides by - 4 )

\frac{2}{-4} = k, that is

k = - \frac{1}{2}

y = - \frac{1}{2} x ← equation of variation

When x = 20, then

y = - \frac{1}{2} × 20 = - 10

You might be interested in
Amber is purchasing a $195,000 home. Her lender has asked her to bring a
lubasha [3.4K]
It is c because I had this question on the test
4 0
3 years ago
Read 2 more answers
Find the area of the figures. lines that appear to be perpendicular are perpendicular
kondor19780726 [428]
You have to use your area equations.like basex height
7 0
3 years ago
What is the percent markup from 125 to 200
Arte-miy333 [17]
25 is equal to 20% of 125
As the increase is 75 (200-125), you've then got to divide the increase by each part to find out how many times it increases.
75/25= 3
20*3= 60
Therefore, there is an increase of 60% 
Hope this helps :) 
8 0
3 years ago
Read 2 more answers
A number r is more than 0 or less or equal to -8
musickatia [10]

r > 0 = r is greater than 0

r ≤ 8 = r is less than and equal to 8

0 ≤ r ≤ 8

6 0
3 years ago
PLEASE HELP ME ASAP!!!!!!!!!!!
ehidna [41]
Look at the picture below!

6 0
2 years ago
Other questions:
  • The chart shows a sample paycheck stub.Salary1106.45Federal122.67Income TaxSocial Security68.60TaxMedicare Tax16.04State Income1
    7·2 answers
  • Rita bakes cakes to earn money. She spent $30 for supplies to make 15 cakes. Which inequality shows how much Rita has to charge
    9·2 answers
  • Solve equation for x. X+16+3x=18+2x
    14·1 answer
  • -x+2y= 1<br> x-3y= 5<br> solve the system please
    5·2 answers
  • Y=2x^2 - 8x+3 graph the equation
    9·1 answer
  • 5
    12·1 answer
  • Kesia is writing a report about two of the world's fastest fish. She wants to put the faster fish on the cover of her report. Th
    5·1 answer
  • Help pleasee its due at 8:00 pm
    5·1 answer
  • Launa bought 20 pizzas for a party. How many pieces of pizza will she have if she divides them each into eighths? A 20 B 190 C16
    6·1 answer
  • What is the measure of angle B in the figure below?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!