Multiply the polynomials using the special product formulas. Express the answer as a single polynomial in standard form.(x + 5y)(x - 5y)
A. x2 - 25y2
B. x2 + 10xy - 25y2
C. x2 - 10y2
D. x2 - 10xy - 25y2
Answer: A
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Factor completely.80x9y7 - 80x7y5 + 48x2y3
A. 16x2y3(5x7y4 - 5x5y2 + 3) B. 16(5x9y7 - 5x7y5 + 3x2y3) C. 16x2(5x7y7 - 5x5y5 + 3y3) D. -16x2y3(-5x7y4 - 5x5y2 - 3)
Evaluate the expression.61
A. 
B. 6
C. 1
D. -6
Solve the problem.Dr. Richards prescribed medicine for Shamille. She is supposed to take one dose every 6 hours. If she takes her first dose at 9 o'clock, when should she take her next dose?
A. 5 o'clock B. 2 o'clock C. 4 o'clock D. 3 o'clock
Use completing the square to rewrite the equation in one of the standard forms for a conic and identify the conic.6x2 - 7y2 - 12x + 42y - 99 = 0
A. (x - 3)2 + (y - 1)2 = 42; circle
B. 
- 
= 1; hyperbola
C. 
+ 
= 1; ellipse
D. (x - 1)2 + (y - 3)2 = 42; circle