Factor by grouping. If prime, so state.10x2 - 4xy - 25xy + 10y2
A. (10x - 5y)(x - 2y)
B. (2x + 5y)(5x - 2y)
C. (2x - 5y)(5x - 2y)
D. (2x - 5)(5x - 2)
Answer: C
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Find an equation that meets the given conditions.y varies inversely as x3, and y = 
when x = 7.
A. y = 5x3
B. y = 
C. y = 
D. y = 
At what points is the given function continuous?f(x, y) = tan (x + y)
A. All (x, y)
B. All (x, y) ? (0, 0)
C. All (x, y) such that x + y ? 
, where n is an integer
D. All (x, y) ? 
Remove or add parentheses as indicated.Rewrite a(b + c) - b(c + a) without parentheses.
A. ac + bc B. 2ab + ac - bc C. ac - bc D. ac + bc + 2ab
Complete the ordered pairs. Then graph the equation by plotting the points and drawing a line through them.y = -x + 4(0, ), ( , 0), (4, )
A. (0, -4), (-4, 0), (4, -8)
B. (0, -4), (4, 0), (4, 0)
C. (0, 4), (4, 0), (4, 0)
D. (0, 4), (-4, 0), (4, 8)