Question

Evaluate each expression.   

A.)  y^4  for y = 2

B.)  x^3 + 5  for x = 3

C.)  (2a)^4  for a = 5

D.)  3a^2  for a =2

Answer 1

A) The expression is y⁴

Substitute y = 2 in above expression.

= 2⁴

= 2 * 2 * 2 * 2

= 16

B) The expression is x³ + 5

Substitute x = 3 in above expression.

= 3³ + 5

= 3 * 3 * 3 + 5

= 27 + 5

= 32

C) The expression is (2a)⁴

Substitute a = 5 in above expression.

= (2*5)⁴

= 10⁴

= 10 *10 *10 *10

= 10000

D) The expression is 3a²

Substitute a = 2 in above expression.

= 3(2)²

= 3 * 4

= 12