SOLVE: y varies directly with x.
When y = 20, x = 50. Find x when y = 36.

Choose one answer.
a. 75
b. 80
c. 90
d. 105

Question

SOLVE: y varies directly with x. 
When y = 20, x = 50. Find x when y = 36.

Choose one answer.
         a. 75
         b. 80
         c. 90
         d. 105

anonymous · Answer

y varies directly with x means:

$$\large y = kx$$

Now when y = 20, x = 50, by plugging in the values, we can find k here:

$$20 = k \times 50 \implies k = \frac{2}{5}$$

anonymous · Answer

Now you have the value of k = 2/5 and y = 36, find x here using same equation that I have written above.

Can you find?

anonymous · Answer

C...?