Question

WILL GIVE 20 POINTS

The steps below are used to solve for the unknown angle, X, but are not arranged in the correct order.

1: x=15
2: 75+15= 90
3: 75+x=90
4: 75-75+x=90-75
Which sequence shows the correct order of the steps Virginia should follow to find the measure of the unknown angle.

A) 1,2,3,4
B) 3,4,1,2
C) 4,2,1,3
D) 2,3,1,4

Answer 1

The answer is B

Explanation:

75 + x = 90

First, Virginia had to write an equation to solve for x.

75 - 75 + x = 90 - 75

Second, Virginia used the subtraction property of equality to isolate x.

x = 15

Third, "x = 15" was the answer Virginia got after subtracting 90 and 75.

75 + 15 = 90

Finally, she had to verify her answer