What is the value of y, if 3+12(y-4)=40?

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?

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Solve the following inequalities and show the solution on a number line. 3/4 (2x-7) ≤ 5