Use a commutative property to complete the statement. Do not simplify.-7 ? a = 
A. 7 ? -a
B. a ? (-7)
C. a - (-7)
D. a + 7
Answer: B
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Express f(x) in complete factored form.f(x) = x4 + 61x2 + 900
A. f(x) = (x + 30i)4 B. f(x) = (x2 + 30i)(x2 - 30i) C. f(x) = (x + 5i)(x - 5i)(x + 6i)(x - 6i) D. f(x) = (x + i)(x - i)(x + 30i)(x - 30i)
Round the money amount to the specified place.$0.08828 to the nearest cent
A. $0.00 B. $1.00 C. $0.09 D. $0.08
Solve the system of equations. If the system has infinitely many solutions, let the last variable be the arbitrary variable. 9x - 6y - 8z = 5 2x + 8y + 5z = -1 18x - 12y - 16z = -9
A. {(2, 2, -1)}
B. ?
C. {(5, -1, -9)}
D. 
Solve the problem.A land developer wants to develop 8 acres of land. Each lot in the development is to be 
of an acre. How many lots will the land developer have in the 8 acres?
A. 
lot
B. 1
lots
C. 2
lot(s)
D. 28 lots