Solve the system by the elimination method.-7x - 52 = 9y 2x - 7y = 33
A. {(-2, -4)}
B. {(-1, -4)}
C. {(-1, -5)}
D. ?
Answer: C
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Solve the problem.The system of equations 
= (-5 + 6y)x and 
= (-5 + x)y describes the growth rates of two symbiotic (dependent) species of animals (such as the rhinoceros and a type of bird which eats insects from its back). Find the equilibrium points.
A. (x, y) = 
B. (x, y) = (0, 0) and (x, y) = 
C. (x, y) = (0, 0) and (x, y) = 
D. (x, y) = (0, 0) and (x, y) = 
Solve the problem.A number decreased from 957 to 785 Find the amount of decrease.
A. 1129 B. 685 C. 172 D. 781
Factor.4x2 - 5x + 9
A. (4x - 9)(x - 1) B. Prime C. (2x - 9)(2x - 1) D. (4x - 1)(x - 9)
Determine whether the relation defines y as a function of x. Give the domain.y = 
A. Function; domain: (-?, ?) B. Not a function; domain (-?, 11) ? (11, ?) C. Not a function; domain: (-?, ?) D. Function; domain (-?, -1) ? (-1, ?)