Chapter 2.1-2.8 Review

Sam paid $11.98 for a 2.38 lb bag of shrimp. Following week, he paid $19.49 for a 4.01 lb bag at another store. Which bag is the better buy?

• The 2.38 lb bag

• The 4.01 lb bag

• Neither

A construction company ordered 85 wood beams for a new project. Each beam was 25.5 ft long. What was the total length of all of the beams put together. 12in=1ft,3ft=1yd,36in=1yd,5280ft=1mi, 1760yd=1mi

• 22.5 yd

• 724.6 yd

• 722.5 yd

• 24.7 yd

An air traffic controller is tracking two planes. To start, Plane A was at an altitude of 432 meters, and Plane B was just taking off. Plane A is gaining altitude at 16 meters per second, and Plane B is gaining altitude at 25 meters per second. For each plane write an expression for the altitude of the plane after x seconds and Write and equation to show that the two planes are at the same altitude.

• Plane A = 432 + 25x Plane B = 16x Equation 432 + 25x = 16x

• Plane A= 432x + 16 Plane b=25x Equation 432x + 16 = 25x

• Plane A= 432 +16x Plane b= 25x Equation 432 + 16x = 25x

Customers of a phone company can choose between two service plans for long distance calls. The first plan has a $20 monthly fee and charges an additional $.08 for each minute of calls. The second plan has no monthly fee but charges $.12 for each minute of calls. For how many minutes of calls will the costs of the two plans be equal?

• 500 minutes

• 550 minutes

• 20 minutes

• 6000 minutes

Solve for a in the equation 18 + a = b

• a = -b -18

• a= 18 - b

• a = b -18

Solve for x in the equation z= (x -5)k

• x= (z +k) -5

• x = z/k + 5

• x = z + k + 5

Solve for c in equation a = 1/3(b + c - d)

• c = (a - b + d) / 3

• c = 3a - b + d

• c = 3a -3b + 3d

Solve for w. 2w + 5 = 4w + 13

• w=8

• w=4

• w=-4

• w=-8

Solve for u. -4(-6u+4) - 3u = 6(u-1)-5

• u= 1/3

• u = -1/3

• u = 2/3

• u = -2/3

Solve for x. -9/x = -15/x + 2

• z=-2

• z=2

• z=-3

• z=3