Combine and simplify, if possible.11 - 4 

A. 7
B. (7- 1)
C. (15- 1)
D. 15


Answer: A

Mathematics

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Factor completely.-82x2 + x4 + 81

A. (x + 1)(x - 1)(x + 9)(x - 9) B. (x + 9)2(x - 1)2 C. (x + 1)2(x - 9)2 D. (x2 + 1)(x + 9)(x - 9)

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Provide an appropriate response.Find the area of the circle whose diameter is 28.5 feet to the nearest hundredth.

A. 203.06 ft2 B. 637.94 ft2 C. 89.54 ft2 D. 2,551.76 ft2

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Solve the problem.In how many ways can a class president and a class secretary be chosen from a group of 8 candidates?

A. 16 B. 15 C. 56 D. 336

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Solve. Round to the nearest tenth.A 30-ft-tall ladder is placed so that it reaches 20 ft up on the wall of a house. How far is the base of the ladder from the wall of the house?

A. 500 ft B. 1300 ft C. 36.1 ft D. 22.4 ft

Mathematics