John bought 65 pounds of potatoes. If potatoes sell for $2.50 for ten pounds, how much did John pay for his potatoes?

You are at a restaurant and owe $56.20 for your meal. you want to leave an 18% tip. approximately how much is your tip?

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.

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?