Write parentheses around the two addends that would be easiest to add. Then find the sum.
+ 
+ 18
A. (
+ 
) + 18 = 8
B. 
+ (
+ 18) = 28
C. (
+ 
+ 18) = 8
D. 
+ 
+ 18 = 
Answer: A
Mathematics
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Evaluate the integral using the given substitution.
dx, u = 9x2
A. 
sin (9x2) + C
B. 
sin (9x2) + C
C. 
sin (u) + C
D. sin(9x2) + C
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Find the limit.
A. -?
B. ?
C. - 
D. 0
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Solve.P = 
for r
A. r = 
B. r = 
C. r = 
D. r = P - tA
Mathematics
Solve the system by the addition method.2x2 + y2 = 66x2 + y2 = 41
A. {(5, 4), (5, -4), (-5, 4), (-5, -4)} B. {(5, 4), (-5, -4)} C. {(4, 5), (-4, -5)} D. {(4, 5), (-4, 5), (4, -5), (-4, -5)}
Mathematics