The difference of 5 times a number and 7 equals 53

Which term best describes the association between variables a and b

Under normal conditions, 1.5 feet of snow will melt into 2 inches of water. during a winter season high in the mountains, 301 feet of snow fell. how many inches of water will there be when the snow melts?

Using only odd number for numerators write two different subtraction problems that have a difference of 3/4