Solve the polynomial inequality and graph the solution set on a number line.(x + 2)(x - 7) < 0
A. (-2, 7)
B. (7, ?)
C. (-?, -2)
D. (-?, -2) ? (7, ?)
Answer: A
Mathematics
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If z = x² - xy + 7y² and (x,y) changes from (2, 1) to (1.85, 1.05) find dz.
What will be an ideal response?
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Find the perimeter. Use 3.14 for ? when needed.
A. 72 cm B. 42 cm C. 237 cm D. 57 cm
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Find the absolute maximum and minimum values of the function on the given curve.Function: 
curve: 
, 
(Use the parametric equations 
A. Absolute maximum: 6
at 
absolute minimum: -6
at 
B. Absolute maximum: 6 at 
absolute minimum: -6 at 
C. Absolute maximum: 6
at 
absolute minimum: -6 at 
D. Absolute maximum: 6 at 
absolute minimum: -6
at 
Mathematics
Evaluate the expression.71
A. 7
B. 1
C. -7
D. 
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