Question

I need help, I have looked on examples on how to figure these problems out and found nothing helpful, please help "/

1. (9m+6) + (-5m - 6)

a) 4m+12
b) 14m+12
c) 14m - 12
d) 4m

2. (3r^2 + 7r + 1) + (4r^2 - 8r - 2)

a) 7r^2 + 15r -1
b) 7r2 - r - 1
c) 7r^2 - 15r - 3
d) -r^2 - r - 1

3. (6h + 1) - (9h + 4)

a) -3h - 3
b) 15h - 5
c) -3h + 3
d) -3h + 5

4. (m^2 - m - 4) + (m - 5)

a) m^2 - 2m + 9
b) m^2 + 2m - 9
c) m^2 - 2m - 9
d) m^2 - 9

5. (4x + 4) + (3x + 2 + 1)

a) 7x + 3
b) x + 7
c) 7x + 7
d) 8x + 6

Answer 1

1. (9m+6) + (-5m - 6). When you see an addition sign, and a negative sign, it would be negative.
So, 9m+6 -5m-6.
Simplify:

A: 4m