Marianna wants to buy a new tennis racket that costs $57.50. she has $8 and plans to save $4.50 each week. how many weeks will it take her to save the money?

She already has $8 so we will first subtract to see how much more money she needs. 

57.50 - 8 = 49.50

So, Marianna needs $49.50 more. To find out how many weeks it will take her to get this amount we will divide. 

49.50 ÷ 4.50 = 11

So, It will take Marianna 11 weeks to save enough money for her new tennis racket.

Hope I helped ya!!