Find an expression for dy/dx.y = (u + 8)(u - 8) and u = x2 + 9
A. 4x(x2 + 9)
B. 2(x2 + 9)
C. 4x(x2 + 9)2
D. 2(x2 + 9) + 2x
Answer: A
Mathematics
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Simplify. Combine like terms if possible.2y - y - 9y
A. -8y3 B. -8y C. -6y D. -7y - y
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Simplify.
A. 
B. 
C. 
D. p2 - 6p + 9
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Solve.Find the area and perimeter of the figure:
A. area: 25
m2; perimeter: 20
m
B. area: 25
m2; perimeter: 20
m
C. area: 27
m2; perimeter: 20
m
D. area: 10
m2; perimeter: 20
m
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