Evaluate.x + y, when x = 4 and y = -9
A. 13
B. -36
C. -5
D. -13
Answer: C
Mathematics
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Rewrite the subtraction problem as an addition problem.(+18) - (-27)
A. (+18) - (+27) B. (+18) + (-27) C. (+18) + (+27) D. None of the above
Mathematics
Provide an appropriate response.Perform the operation and simplify your answer: 
- 
What will be an ideal response?
Mathematics
Use positive rational exponents to rewrite the expression.
A. (y + 1)7/2
B. 
C. (y + 1)9/14
D. (y + 1)5/14
Mathematics
Identify and graph the conic section. Label the center and/or vertex as appropriate.
- 
= 1
A. hyperbola; center (0, 0);
(-
, 0), (
, 0)
B. hyperbola; center (0, 0);
(-2, 0), (2, 0)
C. ellipse; center (0, 0)
(-
, 0), (
, 0), (0, -2), (0, 2)
D. hyperbola; center (0, 0);
(0, -
), (0, 
)
Mathematics