Solve the problem.Car A (travelling north at 30 mph) and car B (traveling west at 40 mph) are heading toward the same intersection. Car A is 3 miles from the intersection when car B is 5 miles from the intersection. . Find a formula for the distance between the cars as a function of time, using the parametric equations that describe the motion of cars A and B. Using a graphing utility, find the minimum distance between the cars. When are the cars closest? 
A. d = 
; 0.6 mi; 6.96 h
B. d = 
; 0.6 mi; 6.96 min
C. d = 
; 0.6 mi; 0.12 min
D. d = 
; 342.2 mi; 6.96 min
Answer: B
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Solve the problem using two linear equations in two variables and 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/hr. What is the flow in each pipe?
A. 720 liters/hr hot, 480 liters/hr cold B. 600 liters/hr hot, 400 liters/hr cold C. 480 liters/hr hot, 720 liters/hr cold D. 400 liters/hr hot, 600 liters/hr cold
Provide an appropriate response.The daily profit for an electronics store from the sale of small televisions is given by P(x) = -x2 + 40x + 825, where x is the number of small televisions sold. Find the function's vertex and intercepts, and graph the function.
What will be an ideal response?
Evaluate.
A. -1 B. 0 C. -5 D. 1
Solve the system by graphing.
A. 
B. 
C. Infinitely many solutions
D. Inconsistent