Find the product.(x + 2)[x - (1 + 7i)][x - (1 - 7i)]
A. x3 + 2x2 + 50x + 100
B. x3 - 46x2 + 96
C. x3 + 46x + 100
D. x3 + 100
Answer: C
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Solve.How much 12% alcohol solution should be mixed with a 4% alcohol solution to get 30 liters of 8% alcohol solution?
A. 15 L of 12%, 15 L of 4% B. 18 L of 12%, 12 L of 4% C. 20 L of 12%, 10 L of 4% D. 9 L of 12%, 21 L of 4%
Find the solution of the initial value problem.
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What will be an ideal response?
Write the equation of the line that passes through the point P(1, 4) and is perpendicular to the line 
.
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A. 
B. ?
C. ?
D. ?
E. ?
Decide if the answer is reasonable or unreasonable by rounding the numbers and estimating the answer. If the answer is not reasonable, find the correct answer.2807.1 ÷ 22.4 = 12.53
A. Reasonable B. Unreasonable, should be 1253 C. Unreasonable, should be 1.253 D. Unreasonable, should be 125.3