Find the value of the expression below for r = 4 and t = 2.
t3 – r + 20 ÷ r
(1 point)
Responses
9
9
72
72
6
6
40
We can substitute r = 4 and t = 2 into the expression t^3 - r + 20/r:
2^3 - 4 + 20/4
= 8 - 4 + 5
= 4 + 5
= 9
The value of the expression is 9.
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To find the value of the expression when r = 4 and t = 2, we substitute these values into the expression step by step.
1. Substitute t = 2:
t3 – r + 20 ÷ r
= 23 – r + 20 ÷ r
2. Substitute r = 4:
= 23 – 4 + 20 ÷ 4
= 8 + 20 ÷ 4
= 8 + 5
= 13
So, the value of the expression for r = 4 and t = 2 is 13.
To find the value of the expression t^3 - r + 20 ÷ r for r = 4 and t = 2, we need to substitute the given values into the expression.
Step 1: Substitute the values for r and t:
t^3 - r + 20 ÷ r
2^3 - 4 + 20 ÷ 4
Step 2: Evaluate any exponent first:
8 - 4 + 20 ÷ 4
Step 3: Perform the multiplication and division from left to right:
8 - 4 + 5
Step 4: Perform the addition and subtraction from left to right:
4 + 5
Step 5: Combine the numbers:
9
So, the value of the expression t^3 - r + 20 ÷ r for r = 4 and t = 2 is 9.