Factor the trinomial completely. If the polynomial cannot be factored, write "prime."x2 + 3xy - 40y2
A. (x - 8y)(x + y)
B. (x - 8y)(x - 5y)
C. (x + 8y)(x - 5y)
D. prime
Answer: C
Mathematics
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Find the average value of the function f over the given region.f(x, y) = 3x + 2y; R = {(x, y): 0 ? x ? 1, 0 ? y ? 1}
A. 4
B. 
C. 
D. 5
Mathematics
Calculate the sum.(-31) + (-50)
A. -19 B. 81 C. -81 D. 19
Mathematics
Simplify the expression using the order of operations. Write the answer as an improper fraction where appropriate.42 + 102 ÷ 22
A. 120 B. 41 C. 29 D. 49
Mathematics
Solve the system by graphing.
A. (0, -6) B. (-6, -1) C. ? D. (0, -1)
Mathematics