X^2 + 4x - 9 = (x + a)^2 + b

Find the value of a and the value of b

Brainlest answer can you find the area and circumference of a circle given the radius or diameter? if its yes or no explain why

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.

Combine the information in the problem and the chart using the average balance method to solve the problem.