Question

Mary simplified the math expression below. The steps that she took are shown. Which is the line where Mary first made her mistake. Line A: – 6 + 9 Line B: [8 + 5 x 3] – 6 + 9 Line C: – 6 + 9 Line D: 23 – 6 + 9 Line E: 23 – 15 Line F: 8

Answer 1

Answer:

Line E

Step-by-step explanation:

Given

The instructions in the question

Required

The first line of mistake

The question has missing details, as the original expression is not given;

Reading through the question, one can observe that, Mary made a mistake at Line E.

The expression on D is:

$23 - 6 + 9$

The expression on E is:

$23 - 15$

The actual result of D is:

$23 - 6 + 9 = 23 + 3$

not

$23 - 15$

Because:

$-6 + 9 = 3$

$-6 + 9 \ne 15$

With the available information, we can conclude that Mary's first mistake is at line E