Solve the system.xy - x2 = -20x - 2y = 3
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Solve.x + y + z = 6x - z = -2 y + 3z = 11
A. (0, 1, 2) B. (1, 2, 3) C. no solution D. (-1, 2, -3)
Mathematics
Solve.A bulk-rate mail permit costs $182 and each piece of bulk mail sent costs 39 cents. In contrast, the rate for mailing a letter first class is 47 cents per piece. How many pieces of mail would someone need to sent in order to make bulk rate the cheaper way to go?
A. 23 B. 27 C. 20 D. 25
Mathematics
Solve for x.
= 6
A. 3 B. 9 C. -3 D. -9
Mathematics
For the given function, find the rate of change.y = 700 - 6x
A. -6 B. 700 C. 6 D. 5
Mathematics