Question

Solve the proportion.8/d = -12/30
A. -45
B. -20
C. -3.2​

Answer 1

B. -20

Explanation:

8/d = -12/30

We can use cross products to solve

8 * 30 = d* -12

240 = -12 d

Divide each side by -12

240/-12 = -12d/-12

-20 = d