Question

Select the correct answer.

A mistake was made in the steps shown to simplify the expression. Which step includes the mistake?
9/2+ 3(4 – 1) – 7 + 23
Step 1: = 9/2 + 3(3) – 7 + 23
Step 2: = 9/2+ 3(3) — 7 +8
Step 3: =
15/2 (3) – 7 + 8
Step 4: =
= 45/2 - 7+8
Step 5: = 31/2+ 8
Step 6: = 47/2

A. Step 5
B. Step 3
C. Step 4
D. Step 1

Answer 1

STEP 3 is wrong

Explanation:

9/2+ 3(4 – 1) – 7 + 2^3

PEMDAS

Parentheses

Step 1: = 9/2 + 3(3) – 7 + 2^3

Exponents

Step 2: = 9/2+ 3(3) — 7 +8

Multiply and divide

********Step 3: =15/2 (3) – 7 + 8 ADDED not multiply

Step 4: = 45/2 - 7+8

Step 5: = 31/2+ 8

Step 6: = 47/2