Question

Evaluate (5x – 4y) = z2 when x = 4, y = 1, and z = 3.

Answer 1

Explanation:

= ( 5x - 4y) = z2

Putting the values given

= 5 (4) - 4(1) = (3)2

= 20 - 5 = 6

= 15 = 6

= 15 - 6

= 9