A student is asked to solve the equation below and to justify her steps. Identify what, if anything, is incorrect in her math or justification.

j - 6 = - 10

Step

Justification

j - 6 = - 10

Given

j - 6 - 6 = - 10 - 6

Addition property of equality

j = - 16

A.

The student has mislabeled the work in the second step as "Addition property of equality."

B.

The student improperly applied the addition property of equality in the second step.

C.

The student rewrote the the problem incorrectly in step 1.

D.

There is no error. The student's justification is correct.

Question

Mathematics

Skylar Reese

21 November, 05:02

A student is asked to solve the equation below and to justify her steps. Identify what, if anything, is incorrect in her math or justification.

j - 6 = - 10

Step

Justification

j - 6 = - 10

Given

j - 6 - 6 = - 10 - 6

Addition property of equality

j = - 16

A.

The student has mislabeled the work in the second step as "Addition property of equality."

B.

The student improperly applied the addition property of equality in the second step.

C.

The student rewrote the the problem incorrectly in step 1.

D.

There is no error. The student's justification is correct.

+5

Answers (1)

Know the Answer?

Axel Wilkinson · Answer 1

B. The student improperly applied the addition property of equality in the second step.

Step-by-step explanation:

We are given j - 6 = - 10. The final answer should be j = - 4 after adding 6 to both sides, but the student got j = - 16. This means that she added wrong. So the answer should be B; she improperly added 6 to both sides (she subtracted 6).