Solve. Write the answer as a mixed number in simplest form.Find the perimeter (distance around) of the polygon below. Each side of the polygon has the same length. 
side length = 7
yd
A. 51
yd
B. 58
yd
C. 49
yd
D. 51
yd
Answer: D
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Divide. Write the answer in lowest terms and as a whole or mixed number where possible.2 ÷ 
A. 1
B. 3
C. 
D. 
Translate the problem to a system of equations, then solve using Cramer's Rule.Twice the water flow in the hot-water pipe is the same as three times the flow in the cold-water pipe. The combined flow is 1200 liters per hour. What is the flow in each pipe?
A. 600 liters/hr hot, 400 liters/hr cold B. 400 liters/hr hot, 600 liters/hr cold C. 720 liters/hr hot, 480 liters/hr cold D. 480 liters/hr hot, 720 liters/hr cold
Solve the system of equations by graphing.2x - y = 3 y = 1 
A. (1, 2) B. (2, 1) C. (-2, -1) D. no solution
Are the given lines parallel, perpendicular, or neither? 3x- y+ 4= 0 , 3x+ y+ 8= 0
(a) parallel (b) perpendicular (c) neither