Sebastian was in a hotel lobby and took the elevator up 7 floors to his room. then he took the elevator down 9 floors to the parking garage. he described his movement with the expression below. 9 + (–7) what is sebastian’s error?

a. sebastian should have used –9 and 7.
b. sebastian should have started at zero before adding –7.
c. sebastian should have switched the two addends and written –7 + 9.
d. sebastian should have used 0 and –9.

because he went up 7 floors then he went 9 floors down

up means positive and down means negative

so that how it work

The answer is A

What is Sebastian’s error?

Sebastian should have used –9 and 7.

hope it helps everyone

~Reem

A, he should have used -9 and 7

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$97520

step-by-step explanation:

add 6% to the value she got from selling the house.

step-by-step explanation: