Add polynomials

simplify:

(-5a^3 - 2a^2) + (6a^3+9a^2+8a)

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?

Which situation can be modeled by the inequality 5 + 10w ≥ 45? a. you start with $5 and save $10 a week until you have at least $45. b. you start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards. c. you start with 5 water bottles and purchases cases of 10 water bottles each until you have a total of 45 water bottles. d. you spend $5 plus $10 per week until you have less than $45.

Apackage of orgainc strwberries costs $1.50 while there in season and $2.25 when not in season what the percent increase