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

i just got done with a test that had this question and aced it, if you need any help just ask!

answer: sensy

step-by-step explanation:

the answer is 18 units because there are 18 small cubes inside the rectangle

hope this and p.s i am also in k12

step-by-step explanation: