Which decimal is greater than Ryan's and less than Sarah's

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.

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x