Question

Evaluate 4x + 5y , when x = 7 and y = 10

Answer 1

Explanation:

4x + 5y

4 × 7 + 5 × 10

28 + 50

78

Therefore its 78.

Answer 2

Hi ;-)

`x=7 \ and \ y=10\\\\4x+5y=4\cdot7+5\cdot10=28+50=\boxed{78}`