Evaluate.
, when x = 27 and y = 21
A. 34
B. 30
C. 48
D. 16
Answer: D
Mathematics
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Solve the problem.Find the dimensions that produce the maximum floor area for a one-story house that is rectangular in shape and has a perimeter of 122 ft. Round to the nearest hundredth, if necessary.
A. 61 ft × 61 ft B. 10.17 ft × 30.5 ft C. 30.5 ft × 30.5 ft D. 30.5 ft × 122 ft
Mathematics
Find the amount of sales tax or tax rate and the total cost. Round money answers to the nearest cent if necessary.Amount of sale: $380 Amount of tax: $34.20
A. 0.9%, $414.20 B. 11%, $414.20 C. 10%, $414.20 D. 9%, $414.20
Mathematics
Add or subtract the mixed numbers.6
+ 5
A. 11
B. 12
C. 11
D. 11
Mathematics
Multiply or divide.(-2)(-7)
A. 9 B. -14 C. 14 D. -9
Mathematics