Question

Use cross multiplication to figure this out. (What does xy = )
.78x/7 = 19/4y

Answer 1

xy = 42.6282051282...

Explanation:

0.78x/7 = 19/4y

0.78x * 4y = 3.12xy

19 * 7 = 133

3.12xy = 133

3.12xy/3.12 = 133/3.12

xy = 42.6282051282...