Question

Jacki evaluated the expression below.

mc021-1.jpg

What was Jacki’s error?
Jacki should have simplified the exponent first.
Jacki should have multiplied 4 and 8 first.
Jacki did not subtract 12 from 8 correctly.
Jacki should not have multiplied 8 and 2.


the pic is the .jpg

Answer 1

2^3(3-1)+4(8-12)

2^3(2)+4(-4)

8(2)+(-16)

16+(-16)

0

Jacki did not subtract 8 and 12 correctly

Answer 2

Answer: Jacki did not subtract 12 from 8 correctly is Jacki's error.

8-12=-4≠4

Explanation:

The right evaluation of the expression by using PEDMAS is

`2^3(3-1)+4(8-12).....\text{[solve parenthesis]}\\=2^3(2)+4(-4).....\text{[solve exponent]}\\=8(2)-16.....\text{[multiply]}\\=16-16.....\text{subtract]}\\=0`

PEMDAS stands for the words parenthesis, exponents, multiplication, division, addition, subtraction which tells us the order[from left to right] of what to calculate first in a single expression which have more than one or two operations..