Solve the system by substitution.-2x = 7y + 17-31 = 3y - 3x
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Perform the indicated operation.-5 - (-19) + (-11 + 18)
A. 21 B. -31 C. 7 D. -17
Mathematics
Factor completely, or state that the polynomial is prime.3x2 - 27
A. 3(x - 3)2 B. prime C. 3(x + 3)(x - 3) D. 3(x + 3)2
Mathematics
Solve the system of equations using Cramer's Rule if it is applicable. If Cramer's Rule is not applicable, say so.
A. x = -3, y = -8; (-3, -8) B. x = 3, y = 8; (3, 8) C. x = 8, y = 3; (8, 3) D. x = -8, y = 3; (-8, 3)
Mathematics
Perform the indicated operation.28 lb 14 oz + 22 lb 5 oz
A. 51 lb 4 oz B. 50 lb 3 oz C. 51 lb 3 oz D. 50 lb 4 oz
Mathematics