Perform the operation and write the result in the standard form.(4 - 2i)(7 + 7i)
A. 42 + 14i
B. 14 - 42i
C. 42 - 14i
D. -14i2 + 14i - 28
Answer: A
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Find the value of the expression.-13 - 
A. -23 B. -3 C. 3 D. 23
Solve the problem.If the height of a rectangular solid is held constant, the volume varies jointly with the length and the width. If the volume is 120 cubic inches when the length is 8 inches and the width is 3 inches, find the volume when the length is 7 inches and the width is 4 inches.
A. 160 in.3 B. 112 in.3 C. 105 in.3 D. 140 in.3
Evaluate the function.For f(x) = x2 - 5, find f(a - 4).
A. a2 - 8a + 11 B. a2 - 8a + 16 C. a2 + 16 D. a2 - 9
Solve the problem.An exam consists of 9 multiple-choice questions and 6 essay questions. If the student must answer 7 of the multiple-choice questions and 3 of the essay questions, in how many ways can the questions be chosen?
A. 21,772,800 B. 720 C. 1134 D. 261,273,600