Find the coordinates of C

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

Which compound inequality could be represented by the graph?

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?