Question

9 Four students were asked to write an expression that is

equivalent to 8x - 20. The students' names and the
expressions they wrote are shown in the table.
Student
Ali
Craig
Ester
Expression
-4(2x + 5)
4(2x - 5)
-2(-4x + 10)
2(4x - 10)
Lisa
a. Which student(s) wrote correct expressions?
b. For each incorrect expression, explain what the
student did to get his or her answer.

Answer 1

Explanation:

8x - 20.....factor a 4 out

4(2x - 5) <=== this one is correct...not 100% sure who wrote it

8x - 20...factor out a 2

2(4x - 10) <==== this is correct

8x - 20....factor out a -2

-2(-4x + 10) <==== this is correct

8x - 20....factor out a -4

-4(-2x + 5).....nobody did this one......but somebody tried....that person didn't factor correctly