Find the value of the expression below for r = 4 and t = 2.
t3 – r + 20 ÷ r
9
72
6
40
Plugging in r = 4 and t = 2 into the expression, we get:
(2)^3 - 4 + 20 ÷ 4
= 8 - 4 + 20 ÷ 4
= 8 - 4 + 5
= 4 + 5
= 9
Therefore, the value of the expression for r = 4 and t = 2 is 9.
To find the value of the expression t3 – r + 20 ÷ r for r = 4 and t = 2, we substitute the values of r and t into the expression.
Substitute r = 4:
t3 – 4 + 20 ÷ 4
Substitute t = 2:
(2)^3 – 4 + 20 ÷ 4
Simplify the expression inside the parentheses first:
8 – 4 + 20 ÷ 4
Simplify the expression 20 ÷ 4:
8 – 4 + 5
Combine like terms:
8 + 5 – 4
Perform addition and subtraction:
13 – 4
The value of the expression for r = 4 and t = 2 is 9.
Therefore, the correct answer is 9.