90% of the students at Jefferson School ride the bus. If 450 students ride the bus, how many students go to Jefferson School in all? plzz

Because of your favorite lemonade it is $3.84 for 3 gallons. write this as an unit rate

Aplane flies around trip to philadelphia it flies to philadelphia at 220 miles per hour and back home with a tailwind at 280 miles per hour if the total trip takes 6.5 hours how many miles does the plane fly round trip

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.