Perform the indicated operation.The shape of a curve in a machined part results in the expression 6R - (3R - r). Simplify the expression.
A. 6R
B. r - 3R
C. 3R - r
D. 3R + r
Answer: D
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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
Find the derivative of y with respect to x, t, or ?, as appropriate.y = 
A. 
B. 
C. 
D. 
From a 
-lb package of ground beef, a 
-lb hamburger was made. How much ground beef is left in the package?
A. 
lb
B. 
lb
C. 
lb
D. 
lb
Solve the problem.The recipe for a chocolate chip cake calls for 
pound of chocolate chips. If a bakery wants to make 20 cakes, how many pounds of chocolate chips will they need?
A. 20 pounds B. 5 pounds C. 16 pounds D. 4 pounds