Evaluate the sum.
3k
A. 66
B. 6
C. -66
D. -6
Answer: C
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Add. Simplify, if possible.-78.01 + (-18.99)
A. 97 B. -97 C. 59.02 D. -59.02
Obtain an equivalent system by performing the stated elementary operation on the system.Multiply the second equation by -1. x - 5y + z = 35x - 2y - z = -18 3x + y + 2z = -18 x - 5y + z = -15
A. -x + 5y - z = -3 5x - 2y - z = -18 3x + y + 2z = -18 x - 5y + z = -15 B. x - 5y + z = 3 -5x + 2y + z = -18 3x + y + 2z = -18 x - 5y + z = -15 C. x - 5y + z = 3 -5x + 2y + z = 18 3x + y + 2z = -18 x - 5y + z = -15 D. x - 5y + z = 3 -5x - 2y - z = -18 3x + y + 2z = -18 x - 5y + z = -15
Multiply and simplify.
? 
A. 1
B. 
C. -1
D. 0
Simplify.5x + 10x(5x2 - 6x - 9) + (-8x + 1)
A. 50x3 - 60x2 - 93x + 1 B. 50x3 - 60x2 + x + 1 C. 50x3 - 93x + 1 D. 50x3 - 60x2 - 93x