Solve.The amount of water used to take a shower is directly proportional to the amount of time that the shower is in use. A shower lasting 17 minutes requires 8.5 gallons of water. Find the amount of water used in a shower lasting 5 minutes.
A. 1.7 gallons
B. 2.5 gallons
C. 28.9 gallons
D. 10 gallons
Answer: B
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Solve by addition or substitution.x + y = -10x - y = -4
A. (7, -2) B. (-7, -3) C. (-8, -2) D. ?
Solve the problem.A nutritionist is preparing a meal for a patient. The meal should contain 575 calories, 42.5 g of protein, and 370 mg of vitamin C. The nutritionist prepares a meal of roast beef, baked potatoes, and broccoli according to the data in the following table: 
How many servings of each food are needed in order to satisfy the requirements?
A. Roast beef: 1; baked potato: 
; broccoli: 3
B. Roast beef: 1
; baked potato: 1; broccoli: 3
C. Roast beef: 
; baked potato: 
; broccoli: 3
D. Roast beef: 1; baked potato: 1; broccoli: 3
Solve and give interval notation for the solution set. Then graph the solution set.4x < 20 or x + 2 ? 11
A. (-?, -9] ? (5, ?)
B. (5, ?)
C. (-?, 9]
D. (-?, 5) ? [9, ?)
Give the value of the function in radians. Round to the nearest thousandth when necessary.tan-1 1.2524
A. 0.797 B. 0.997 C. 0.897 D. 1.097