Provide an appropriate response.Choose the expression that is equivalent to the following: (5x + 4y)(8y + 4x)
A. (5x + 4x)(4y + 8y)
B. (5x + 4y)(4y + 8x)
C. 9x + 12y
D. (5x + 4y)(4x + 8y)
Answer: D
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Find the limit.
8 cos 
A. 1 B. 8 C. 0 D. - 8
Solve the equation.
= 9
A. x = 360 B. x = 26 C. x = 36 D. x = 32
Provide an appropriate response.Suppose that a, b, and c are real numbers and that the polynomial function f may be expressed in factored form as 
. If b2 - 4ac = 49, determine the number of rational, irrational, and imaginary zeros that f has.
A. 2 rational zeros, 2 irrational zeros, 0 imaginary zeros B. 0 rational zeros, 0 irrational zeros, 4 imaginary zeros C. 4 rational zeros, 0 irrational zeros, 0 imaginary zeros D. 2 rational zeros, 0 irrational zeros, 2 imaginary zeros
Solve the problem.If an object is thrown upward with an initial velocity of 11 feet per second, then its height (in feet) is given by 
after time t seconds. What is its maximum height?
A. 33 ft B. 99 ft C. 121 ft D. 124 ft