Solve the system by the substitution method.x2 + y2 = 181 x + y = -19
A. {(9, 10), (10, 9)}
B. {(-9, -10), (-10, -9)}
C. {(-9, 10), (-10, 9)}
D. {(9, -10), (10, -9)}
Answer: B
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Solve the problem.A packing carton used by a manufacturer of toys can hold a maximum of 33 pounds. Assuming that space is not a problem, what is the maximum number of train sets that can be packed in a single carton if each train set weighs 2.67 pounds?
A. 13 train sets B. 88 train sets C. 12 train sets D. 11 train sets
Solve the equation and check your proposed solution.
= 13
A. 18 B. -65 C. 65 D. -18
Solve.x2 + y2 - 2xy = 36x2 + y2 + 2xy = 196
A. (20, -8),(-20, -8), (-8, 20), (8, 20) B. (10, -4), (-10, -4), (-4, 10), (4, 10) C. (-4, 10), (-4, -10) D. (10, 4), (-10, 4), (4, 10), (-4, 10)
Differentiate.g(x) = 
A. g'(x) = 
B. g'(x) = 
C. g'(x) = 
D. g'(x) = 