C because your buying it so you add it to the total but it would be a negative because you taking it away hope it helped
Answer:
length 5cm, width 4cm, door width 2/5cm or. 4cm, length 10 ft, width 7.5 ft
10. He will need 11,4 minutes to get to sea level. To get to 30 he'll need 6 minutes.
11. He'll be able to cut 4 complete pieces.
Answer:
1x^2+8x
Step-by-step explanation:
Combine like terms
6x^2+(-5x^2)+10x+(-2x)+(-1)+1
1x^2 +8x+0
And there you go