1. (9m + 6) + (–5m – 6)
4m + 12
14m + 12
14m – 12
4m
2. (3r^2 + 7r + 1) + (4r^2 – 8r – 2)
7r2 + 15r – 1
7r2 – r – 1
7r2 – 15r – 3
–r2 – r – 1
3. (6h + 1) – (9h + 4)
–3h – 3
15h – 5
–3h + 3
–3h + 5
4. (–7w^2 – 2w – 1) – (–5w^2 + 3w – 2)
12w^2 + 5w + 1
–2w^2 – 5w – 1
–2w^2 – 5w + 1
–12w^2 – 5w – 3
My answers:
1. 14m + 12
2. 7r2 – r – 1
3. 15h – 5
4. –12w^2 – 5w – 3
1 D
2 B
3 A
4 C
5 C
CrendyGal is CORRECT
1 D
2 B
3 A
4 C
5 C
ok
is #4 "-2w^2 - 5w + 1"?
mastery #4 is wrong its C but the rest are correct
Crandall is right
Crandygal is still correct for UCA
4 is right now.
1, 3, and 4 are wrong.
Please go back and study working with negative numbers.
I agree with Ms. Sue. Negative number play seems to be the problem with the incorrect problems.
For 8th graders in ACA the Lesson 2: Adding and Subtracting Polynomials it is:
D
B
A
D
C
It could be different for some so just be careful