amy is saving money to buy a bike that costs $125. she has $60 and will save an additional $5 each week. in how many weeks will she have enough money to buy the bike

Ineed to learn how to solve this problem

Solve the system of equations. y= 2x y= x^2 - 15

Jose predicted that he would sell 48 umbrellas. he actually sold 72 umbrellas. what are the values of a and b in the table below? round to the nearest tenth if necessary