Add or subtract. Assume all variables represent positive real numbers.
+ 2
+ 6
A. 31
B. 8
C. 31
D. 8
Answer: C
Mathematics
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Perform the indicated operation. Simplify the result if possible.2 yd 2 ft × 7
A. 26 yd 2 ft B. 18 yd 2 ft C. 6 yd 1 ft D. 18 yd 1 ft
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Subtract the polynomials.(3x - 2) - (-7x + 10)
A. -4x + 8 B. -4x - 12 C. 10x + 8 D. 10x - 12
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Solve the problem.Suppose that the demand function for x units of a certain item is 
where p is the price per unit, in dollars. Find the marginal revenue.
A. 
= 100 + 
B. 
= 100 + 
C. 
= 
D. 
= 
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Solve the inequality.For the function f(x) = x2 - 4x - 5, solve f(x) ? 0.
A. (-?, -1] ? [5, ?) B. [5, ?) C. (-?, -1] D. [-1, 5]
Mathematics