19. marianna wants to buy a new tennis racket that
costs $30. she has $8 and plans to save $2 each
week. how many weeks will it take marianna to
save the money?

Solve each quadratic equation by factoring and using the zero product property. 14x - 49 = x^2

42. if 20 men can eat 200 kg of wheat in 40 days, then 10 men can eat 300 kg of wheat in how many days? a) 120 days b) 60 days c) 80 days d) none of these

One cell phone plan charges $20 per month plus $0.15 per minute used. a second cell phone plan charges $35 per month plus $0.10 per minute used. write and solve an equation to find the number of minutes you must talk to have the same cost for both calling plans.