Title: Math 7 Distribute and Combine Like Terms
Course: quiz duplicate error

Q: Simplify:  3x + 5 – x
- 2x + 5
- 7x (The 2x and 5 were added, not multiplied.)
- 2x (What happened to the 5?)
- 4x + 5 (You needed to subtract x or add a -x.)
A: 2x + 5

Q: Simplify: 3(x – 2)
- 3x – 2
- 3x – 6
- -3x
- -6x
A: 3x – 6

Q: Simplify:  -3(x – 2) + 8
- -3x + 14
- -3x + 6
- -3x + 2
- -6x + 8
A: -3x + 14

Q: Simplify:  -3(x + 2) + x – 4
- 2x – 10
- -2x – 10
- -2x – 2 (The constants were -6 - 4 or -6 + -4)
- -4x + 10
A: -2x – 10

Q: Simplify.

-9(m – 7) – 6
- -9m + 69 (incorrect)
- 9m + 57 (incorrect)
- -9m + 57 (correct)
- 9m + 69 (incorrect)
A: -9m + 57

Q: Simplify.

3t + 4(3 – 5t)
- -17t + 12 (correct)
- 15t + 12 (incorrect)
- -17t + 7 (You needed to multiply the 4 to the -5t)
- 15t + 7 (incorrect)
A: -17t + 12

Q: Simplify.

3 – 7(m – 9)
- 60 - 7m (incorrect)
- -60 - 7m (incorrect)
- 66 - 7m (correct)
- -60 + 7m (incorrect)
A: 66 - 7m

Q: Use the distributive property to simplify the expression.

-(3x + 9y)
- 3x + 9y (incorrect)
- -3x + 9y (incorrect)
- 3x - 9y (incorrect)
- -3x - 9y (correct)
A: -3x - 9y

Q: Simplify.

4 – 3(2x – 3)
- -6x + 1 (Did you multiply the -3 by the -3 also?)
- -6x + 13 (Correct)
- 2x - 3 (You must multiply before you add or subtract.)
- -6x - 5 (Wasn't that a -3 times a -3?)
A: -6x + 13

Q: Simplify.

-6(-x + 1) – (9x – 8)
- -3x + 14 (incorrect)
- 15x + 2 (incorrect)
- -3x + 2 (correct)
- 15x + 14 (incorrect)
A: -3x + 2

Q: Simplify: 2(x – 1) + 4x – 6 + 2x
- 8x – 8
- 8x – 7
- 6x – 7
- 8x – 4
A: 8x – 8

Q: Simplify: 3x + 5 – x – 3(x + 2)
- -x – 1
- -x + 7
- -x + 11
- 7x + 11
A: -x – 1

Q: Simplify: 5 + 2(x – 3)
- 7x – 21 (Don't add the 5 + 2 first. You have to do the multiply before the add.)
- 2x – 1
- 2x – 7
- 2x + 2 (You need to multiply the 2 times the -3.)
A: 2x – 1

Q: Simplify.

8 – (8 – 3t)
- 3t (Correct)
- -3t (You should be taking the opposite of -3t or subtract -3t)
- -16 - 3t (incorrect)
- 13t (incorrect)
A: 3t

Q: Simplify: 2(5 – 3x) – 7x + 4
- 14 – 10x
- 14 – 13x
- 9 – 10x
- -10x
A: 14 – 13x

Q: Simplify: -(4x – 3) – 5x + 2
- -9x + 5
- -9x – 1
- -x + 5
- -x – 5
A: -9x + 5

Q: Simplify.

-(5 – m) + m^2 - 6
- m^2 + m - 11 (correct)
- m^2 - m + 11 (The 11 should be negative)
- m^2 - m - 11 (incorrect)
- m^2 + m + 11 (incorrect)
A: m^2 + m - 11

Q: Simplify: 12x – 6 – (12x + 2)
- -8
- -4
- -24x – 4
- -24x + 4
A: -8