Answer:
Step-by-step explanation:
1). m³ + 4
By substituting m = 4 in the given expression,
(4)³ + 4 = 68
2). 3r ÷ 2
By substituting r = 8 in the expression,
3(8) ÷ 2 = 12
3). 5w²- 3w
By substituting w = 2 in the expression,
5(2)² - 3(2) = 20 - 6
= 14
4). 7x¹. x⁰
= 7x(1) [Since, 0 power of any number = 1]
= 7x
By substituting x = 3
7x = 7(3) = 21
