)one-thirds added to twice a number.

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

Which equation represents a line that is parallel to the line whose equation is 3x-2y=7( show all work)

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?