Factor the polynomial completely.6x2y2 + 7xy2 - 20y2
A. (2x - 4y)(3x + 5y)
B. (3x - 4y)(2x + 5y)
C. y2(x - 4)(6x + 5)
D. y2(3x - 4)(2x + 5)
Answer: D
Mathematics
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Find the length of the curve.The circle r = 7 sin ?
A. 7?
B. 14?
C. 49?
D. 
?
Mathematics
Factor by grouping.4m(6 - m) + 7n(6 - m)
A. m(4 + 7n)(6 - 1) B. No common factor (except 1) C. (4m - 7n)(6 - m) D. (4m + 7n)(6 - m)
Mathematics
Solve the problem.When making a telephone call using a calling card, a call lasting 6 minutes cost $2.00. A call lasting 13 minutes cost $3.75. Let y be the cost of making a call lasting x minutes using a calling card. Write a linear equation that models the cost of a making a call lasting x minutes.
A. y = -0.25x + 3.5 B. y = 4x - 22 C. y = 0.25x - 9.25 D. y = 0.25x + 0.5
Mathematics
Solve the equation.
= 
A. {-8} B. {8} C. {16} D. {8, -8}
Mathematics