Using the digit 0 to 9 at most one time each, fill in the boxes to make a true equation

Suppose that a households monthly water bill (in dollars) is a linear function of the amount of water the household uses (in hundreds of cubic feet, hcf). when graphed, the function gives a line with slope of 1.65. if the monthly cost for 13 hcf is $46.10 what is the monthly cost for 19 hcf?

How do i put 3(x+7) in distributive property

If f(x)=3 over x+2 - square root x-3 then f(7)=