Solve the system of equations. x - z = -73x - y= -1 x + y + z = 18
A. (2, 3, 9)
B. (2, 7, 9)
C. (-1, 7, 9)
D. No solution
Answer: B
Mathematics
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Simplify, where possible.5(x + 9)
A. x + 45 B. 5x + 45 C. 45x D. 5x + 9
Mathematics
Divide, if possible. Write the answer in simplest form.
÷ 
A. 
B. 
C. 
D. 
Mathematics
Determine whether the relation defines y as a function of x. Give the domain.y = x3
A. Not a function; domain: (-?, ?) B. Not a function; domain: all whole numbers C. Function; domain: (-?, ?) D. Function; domain: all whole numbers
Mathematics
Simplify. Assume that all variables represent positive real numbers.- 
A. -7
B. -6
C. 7
D. -5
Mathematics