Multiply and simplify.
? 
A. x3y4
B. x3y8
C. x3y9
D. x3y8
Answer: B
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Factor out the largest common factor.m(n2 - 7) - 2(n2 - 7)
A. (n2 - 7)(m + 2) B. (n2 - 7)(m - 2) C. mn2 - 7m - 2n2 + 14 D. (n2 - 2)(m - 7 )
Find zw or 
as specified. Leave your answer in polar form.z = 6
w = 12
Find 
.
A. 
B. 
C. 
D. 
Solve the compound inequality and graph the solution set on a number line. Except for the empty set, express the solution set in interval notation.-4x ? -12 or 4x > 12x - 8 
A. (-?, 1) ? [3, ?)
B. (-?, 1] ? (3, ?)
C. ?
D. (1, 3]
Solve the problem.A certain area of forest is populated by two species of animals, which scientists refer to as A and B for simplicity. The forest supplies two kinds of food, referred to as F1 and F2. For one year, species A requires 1.45 units of F1 and 1 units of F2. Species B requires 2.4 units of F1 and 1.9 units of F2. The forest can normally supply at most 859 units of F1 and 491 units of F2 per year. What is the maximum total number of these animals that the forest can support?
A. 931 animals B. 200 animals C. 491 animals D. 338 animals