Translate the phrase; then simplify.Find the sum of 
and 
.
A. 47
B. 43
C. -47
D. -43
Answer: B
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Solve the problem.A class consists of 19 girls and 10 boys. In how many ways can 4 girls and 4 boys be selected from this class to form a team?
A. 7752 B. 420 C. 13,023,360 D. 813,960
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
Use the graph to find a ? > 0 such that for all x, 0 < 
< ? ? 
< ?.
A. 0.04 B. 0.5 C. 0.4 D. 10
Use a graphing utility to find the equation of the line of best fit. Round to two decimal places, if necessary.
A. y = 1.79x - 1.86 B. y = 0.43x + 1.79 C. y = -1.86x + 1.79 D. y = 1.79x + 0.43