Solve.x - y + z = 72y + z = 10 z = 2
A. (10 , 5, 2)
B. (10 , -5, 2)
C. (9 , 4, 2)
D. (9 , -4, 2)
Answer: C
Mathematics
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Use the given triangles to evaluate the expression. Rationalize all denominators. 
cot 60° - cos 45°
A. 
B. 
C. 
D. 
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Simplify.
-2
A. 
B. 
C. 
D. 
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Evaluate the expression.
A. -2160
B. 
C. 81
D. 
Mathematics
Solve the problem.This year, an appliance store is selling a microwave for $471.85, up 8% from its selling price last year. What was the selling price of the microwave last year? Round to the nearest cent.
A. $432.89 B. $262.14 C. $436.90 D. $440.98
Mathematics