Use the distributive property to write the expression without parentheses. Then simplify if possible.7(8y + 2) - 9(2y + 7)
A. -81y
B. 38y - 49
C. 38y + 7
D. -7y - 2
Answer: B
Mathematics
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Solve the problem.Find the centroid of the region in the first quadrant bounded by the curve y = 11 cos x and the axes.
A. 
= 
, 
= 
B. 
= 
, 
= 
C. 
= 
, 
= 
D. 
= 
, 
= 
Mathematics
Solve the problem.Find the center of mass of the first-octant portion of a solid ball of radius 4 centered at the origin.
A. (
, 
, 
) = 
B. (
, 
, 
) = 
C. (
, 
, 
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D. (
, 
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Mathematics
Multiply the expressions.(8x + 5y)(8x - 5y)
A. 8x2 - 5y2 B. 64x2 - 80xy - 25y2 C. 64x2 - 25y2 D. 64x2 + 80xy - 25y2
Mathematics
Write the partial fraction decomposition of the rational expression.
A. 
+ 
B. 
+ 
+ 
C. 
+ 
D. 
+ 
+ 
Mathematics