Acar uses one gallon of gasoline for every 20 miles it travels. if a gallon of gasoline costs $3.98, how much will the gas cost, to the nearest dollar, to travel 180 miles?

43lbs of tomatos cost $387. how much would 41lbs cost

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.

What is the slope of the line (-7,2) (4,6)