Question

Simplify: [10+15(2^3)]/[7(2^2)-2]
Step 1 [10+15(8)]/[7(4)-2]
Step 2 [10+120]/[28-2]
Step 3 130/26
Step 4 1/5
Which is the first incorrect step? Explain the error.

Answer 1

Do you see a problem in going from Step 3 to Step 4? @Claire922

Step 3 130/26

Step 4 1/5

Answer 2

thats what i was wondering. Did it start in step 3 or step 4? @Directrix

Answer 3

What is 130 divided by 26 ?

Answer 4

5 @Directrix

Answer 5

Right.

Simplify: [10+15(2^3)]/[7(2^2)-2]

Step 1 [10+15(8)]/[7(4)-2]

Step 2 [10+120]/[28-2]

Step 3 130/26 ---> means 130 divided by 26

Step 4 1/5 ---> the error here is that the person did 26 divided by 130 and got 1/5.

Division is not commutative. Order matters.

Answer 6

oh thanks.

Answer 7

Okay. Any questions?

Answer 8

no