Solve the problem.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 L/hr. What is the flow in each pipe?
A. 600 L/hr hot; 400 L/hr cold
B. 720 L/hr hot; 480 L/hr cold
C. 480 L/hr hot; 720 L/hr cold
D. 400 L/hr hot; 600 L/hr cold
Answer: B
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Solve the system of equations by determinants. 3w + x - 3y + z = -8-w + 3x + y - 3z = 45w - x + 3y + 3z = 36 w + x - 3y - z = -12
A. w = 5, x = -4, y = 0, z = 3 B. w = 5, x = -2, y = 6, z = -3 C. w = -5, x = -6, y = 12, z = 3 D. w = -2, x = 4, y = 7, z = 1
Solve area problem.A rubber ice-hockey puck has a 3.4 in. diameter. What is the area of one flat surface?(Use 3.1 4 for ? .)
A. 10.676 in.2 B. 36.2984 in.2 C. 4.5373 in.2 D. 9.0746 in.2
Solve.Suppose that a polynomial function is used to model the data shown in the graph below.
For what intervals is the function increasing?
A. 0 through 20 and 30 through 50 B. 0 through 50 C. 0 through 10 and 30 through 50 D. 0 through 10 and 40 through 50
Find the vertex by completing the square.y = x2 + 3x - 17
A. 
B. 
C. 
D. 