Find the following. Assume that the letter can represent any real number.
A. (5x + 2)2
B. 
C. 
D. 
Answer: D
Mathematics
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Find the center of mass of a thin plate of constant density covering the given region.The region bounded by the parabola y = 81 - x2 and the x-axis
A. 
= 0, 
= 
B. 
= 0, 
= 
C. 
= 
, 
= 0
D. 
= 0, 
= 
Mathematics
Evaluate the expression for the given values.
(a) m = 5, n = 5(b) m = 5, n = 20(c) m = 6, n = 3
A. (a) 0
(b) undefined
(c) 
B. (a) 0
(b) undefined
(c) 
C. (a) undefined
(b) 0
(c) 
D. (a) undefined
(b) 0
(c) 
Mathematics
Evaluate the function f at the indicated value.
{3x + 5, if x ? 06 - 5x, if 0 < x < 5x, if x ? 5
A. 23 B. 6 C. -24 D. 5
Mathematics
Solve the problem.A building contractor finds that 
can of pipe joint compound is needed to plumb each new home. How many homes can be plumbed with 24 cans of compound?
A. 60 homes
B. 24 homes
C. 30 homes
D. 9
homes
Mathematics