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
40
First, let's sub in the given values of r = 4 and t = 2 into the expression:
t3 – r + 20 ÷ r
2^3 – 4 + 20 ÷ 4
Next, let's simplify the expression following the order of operations (PEMDAS):
2^3 is 8.
20 ÷ 4 is 5.
Therefore, the expression becomes:
8 – 4 + 5
Now, let's simplify further:
8 – 4 = 4.
4 + 5 = 9.
So, the value of the expression for r = 4 and t = 2 is 9.
To find the value of the expression t^3 - r + 20 ÷ r for r = 4 and t = 2, follow these steps:
Step 1: Substitute the values of r and t into the expression.
t^3 - r + 20 ÷ r
2^3 - 4 + 20 ÷ 4
Step 2: Evaluate the exponent (2^3).
8 - 4 + 20 ÷ 4
Step 3: Evaluate the division (20 ÷ 4).
8 - 4 + 5
Step 4: Evaluate the subtraction and addition.
= 8 - 4 + 5
= 4 + 5
= 9
So, the value of the expression for r = 4 and t = 2 is 9.