You have 140 yards of fencing to enclose a rectangular garden. Express the area of the garden, A, as a function of one of its dimensions, x.

A rectangular parcel of land has width, w feet. The length of the diagonal, d, between opposite corners is 18 feet more than the length of the parcel. Note that d is lowercase. (a) Express the length, L, of the parcel as a function of d. (b) Express the width, w, of the parcel as a function of d. (c) Express the area, A, of the parcel as a function of d. L = W = A = (d) Suppose a fence is to be built around the perimeter of the rectangular parcel of land. The fencing material will cost $25 per foot. Express the total cost, C, of fencing the parcel as a function of d. C =

A college math placement test has 50 questions. The score is computed by awarding 4 points for each correct answer and subtracting 2 points for each incorrect answer. Determine the linear function that would be used to compute the score. Use the function to determine the score when a student gets 35 questions correct.

A closed box is to be built and it's volume must be 30 cubic feet. If the base of the box is a rectangle that is twice as long as it is wide, write the surface area function for this box in terms of the width of its base.