Ms knight wants to throw a pizza party for all the 7th graders. 13 out of 20 preferred pepperoni pizza and the other 7 preferred cheese. Out of 400 how many prefer pepperoni

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

Rob filled 5 fewer plastic boxes with football cards than basketball cards. he filled 11 boxes with basketball cards.

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.