Plz my best friend is stuck on her homework she said its due tomorrow she doesn't know the answers to these questions and she said she doesn't understand algebra (neither do i) points for anyone who

1, 2, 3, 4, and 5 are all correct.  Good work !

6). Add up all the 'h' things ... 6h
Then add up all the 'd' things ... -3d
The result . . .  6h - 3d

7).  Add up all the x² things ... 17x²
Then add up the just-plain-x things ... 4x
The result . . . 17x² + 4x

8). Add up the c² things . . .  -2c²
Then add up the just-plain-c things ... 5c
The result . . .  -2c² + 5c

9).  Add up the 'jm' things ... 25jm
Then add up the just-plain-j things ... 2j
The result ... 25jm + 2j

10). Add up the 'ac' things ... 2ac
Then add up the just-plain-c things ...  -12c
The result . . . 2ac - 12c

11).  Add up the x² things . . . 12x²
Then add up the 'xy' things . . . 12xy
The result . .. 12x² + 12xy

Are you starting to get the idea ?
Do I still have to do the rest of them ?

12). Add up the x³ things . . . 14x³
Then add up the x² things . . . 19x²
The result . . . 14x³ + 19x²

13).  Add up the h³ things . . .  -2h³
Then add up the  h² things ...  -1h²
The result . . .  -2h³ - 1h²

14).  Add up the m⁴ things . . . 31m⁴
Add up the u² things . . . 18u²
Add up the naked numbers . . . 8
The result . . . 31m⁴ + 18u² + 8

15).  Add up the q² things . . . zero
Add up the 'k' things . . . zero
The result . . . zero

16).  Add up the g²h things (g²h is the same as hg²) . . .  -9g²h
Add up the 'gh' things . . . 4gh
Add up the 'h' things . . .  -11h
The result . . .  -9g²h + 4gh - 11h

Thank you for the 5 points.  The crust of green bread
and the warm cloudy water are also delicious.

820,000 is the answr