Factor by any method.30x2 + 36xy + 25xy + 30y2
A. (30x + 5y)(x + 6y)
B. (6x + 5)(5x + 6)
C. (6x - 5y)(5x + 6y)
D. (6x + 5y)(5x + 6y)
Answer: D
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Calculate the circulation of the field F around the closed curve C.F = - 
x2yi - 
xy2j; curve C is r(t) = 10 cos ti + 10 sin tj, 0 ? t ? 2?
A. - 
B. 0
C. - 
D. - 
Provide an appropriate response.Write an expression that represents the perimeter of the equilateral triangle (a triangle with three sides of equal length). Simplify the expression.
A. (9x + 3) in. B. (18x + 18) in. C. (18x + 6) in. D. (9x + 9) in.
Choose the equation that matches the graph.
A. f(x) = -x2 - 2x - 3 B. f(x) = x2 - 2x - 3 C. f(x) = x2 + 2x - 3 D. f(x) = x2 - 2x + 3
Solve the problem.Suppose the consumption of electricity grows at 4.4% per year, compounded continuously. Find the number of years before the use of electricity has tripled. Round the answer to the nearest hundredth.
A. 24.97 yr B. 0.25 yr C. 68.18 yr D. 2.50 yr