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

Answer 1

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:

\[20 = k \times 50 \implies k = \frac{2}{5}\]

Answer 2

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?

Answer 3

C...?