Question

use the order of operations to simplify 8 + 7 x 6 - 3 x 4 + 6 x 7
A. 120
B. 80
C. 2,478
D. 36

Answer 1

To simplify the expression using the order of operations, we need to follow the acronym "PEMDAS" which stands for Parentheses, Exponents, Multiplication and Division (from left to right), and Addition and Subtraction (from left to right).

Let's simplify step by step:
8 + 7 x 6 - 3 x 4 + 6 x 7

First, multiply:
8 + 42 - 3 x 4 + 6 x 7

Next, multiply:
8 + 42 - 12 + 42

Now, add and subtract from left to right:
(8 + 42) - 12 + 42
= 50 - 12 + 42

Now, subtract and add from left to right:
50 - 12 + 42
= 38 + 42

Finally, add:
38 + 42
= 80

Therefore, the simplified expression is 80.
The correct answer is B.