Factor using the ac-method.108x2 + 63xy + 9y2
A. prime
B. 9(3x + y)(4x + y)
C. (27x + 9y)(4x + y)
D. 9(3x - y)(4x - y)
Answer: B
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Find the exact value of x.cos-1 x = csc-1 
A. 
B. 
C. 
D. 
Solve the problem.Sun Woo Kim invested $2500 at 4% compounded semiannually. How much will be in the account after 8 years? Round to the nearest cent.
A. $3431.96 B. $2929.15 C. $4682.45 D. $3421.42
?Let 
.Find the average rate of change of y with respect to x in the interval from 
to 
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to 
, from 
to 
, and the (instantaneous) rate of change of y at 
.
?
A. ?
B. ?
C. ?
D. ?
Determine whether the equation is linear or nonlinear.y = 5
A. Nonlinear B. Linear