Can someone plz do exercises 3 and 4 PLEASE can you even send pictures to people on here because it the steps are typed out I’m not going to understand

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

If the cost to mail a package is an initial $5 and $0.28 for every pound the total cost to mail a package was $11.27, how much did the package weigh?

Complete the steps, which describe how to find the area of the shaded portion of the circle. find the area of the sector by multiplying the area of the circle by the ratio of the to 360. subtract the area of the triangle from the area of the sector.