Factor by grouping.xy + y + 9x + 9
A. (x + 9)(y + 1)
B. (x + 1)(y + 9)
C. (9x + 9)(y + 1)
D. (x + 1)(9y + 9)
Answer: B
Mathematics
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Solve the literal equation for the specified variable.A = 
bh for h
A. h = 
B. h = 
C. h = 
D. h = 
Mathematics
Determine the value of the variable so that the equality is a proportion.
= 
A. 7.43 B. 0.07 C. 13.44 D. 9
Mathematics
Determine whether the function f(x) = (x + 4) 2 , x ? –4 has an inverse function. If it does, find the inverse function.
a. 
b. f –1 (x) = –(x + 4) 2
c. f –1 (x) = (x + 4) –2
d. 
Mathematics
Simplify the expression. All exponents should be positive integers.
A. -2x6y3 B. -2x5y6 C. x6y3 D. -2x5y2
Mathematics