Find the center and radius of the circle.x2 + y2 - 10x + 4y = -4
A. (5, -2), r = 5
B. (-2, 5), r = 5
C. (2, -5), r = 25
D. (-5, 2), r = 25
Answer: A
Mathematics
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Factor.15x2 - 16xy + 4y2
A. (3x + 2y)(5x + 2y) B. (3x + 2y)(5x - 2y) C. (3x - 2y)(5x - 2y) D. (15x + 2y)(x + 2y)
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Perform the indicated operation.(11x2 - xy - y2) + (x2 + 6xy + 4y2)
A. 11x2 + 6xy + 4y2 B. 10x2 - 7xy - 5y2 C. 12x2 + 5xy + 3y2 D. 12x2 + 7xy + 5y2
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Solve the problem.How much pure acid should be mixed with 9 gallons of a 50% acid solution in order to get an 80% acid solution?
A. 4.5 gal B. 22.5 gal C. 13.5 gal D. 36 gal
Mathematics
Write the expression in lowest terms.
A. 1
B. - 
C. 
D. -1
Mathematics