Which matrix equation represents the system of liner equations?

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.

Interpret the following expression (5y^2-7)^3/(2y)^2

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.