Find the exact value of the expression.
A. 
B. 
C. 
D. 2
Answer: A
Mathematics
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Multiply.(7a)(7a2)
A. 49a3 B. 7a + 7a2 C. 14a3 D. 49a2
Mathematics
Solve the system by the substitution method.
A. (-9, 4), (-10, 5) B. (-9, 4), (4, -9) C. (-9, 4), (-4, 9) D. (-9, 4)
Mathematics
The function f is a probability density function defined on the given interval. Find 
.
?
?
A. ?
B. ?
C. ?
D. ?
E. ?
Mathematics
Evaluate the integral.
A. -2
B. - 
C. 0
D. 2
Mathematics