If a cyclist is traveling at 20 miles per hour, how many hours will it take him to travel 15 miles?

Mary used 1/7 of a spool of ribbon to complete 4 projects. she used the same amount of ribbon on each project. how much ribbon did she use on each project?

Xto the second power plus 14x plus 48. what are the factors? we are doing factoring trinomials with a=1

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.