Evaluate the expression using the given values.-2x + y
x = 5, y = -3
A. 7
B. 2
C. -5
D. -13
Answer: D
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Let U = {all soda pops}; A = {all diet soda pops}; 
and 
Describe the given set in words.A ? B ? D
A. All soda pops not in cans B. All diet, caffeine-free, cola soda pops C. All diet, caffeine-free, cola soda pops in cans D. All diet, all cola, and all caffeine-free soda pops
Without using a calculator, give the exact trigonometric function value with rational denominator.cot 45°
A. 1
B. 
C. 
D. 
Solve the variation problem.The amount of time it takes a swimmer to swim a race is inversely proportional to the average speed of the swimmer. A swimmer finishes a race in 30 seconds with an average speed of 5 feet per second. Find the average speed of the swimmer if it takes 37.5 seconds to finish the race.
A. 3 feet per second B. 5 feet per second C. 6 feet per second D. 4 feet per second
Use the given trigonometric function value of ? to find the requested trigonometric function value of the acute angle ?. Rationalize the denominator where necessary.csc ? = 
Find cot ?.
A. 
B. 
C. 
D. 