Factor the polynomial.wy - 4y - wk + 4k
A. (w + 4)(y - k)
B. (w + y)(4 - k)
C. (w - k)(y - 4)
D. (w - 4)(y - k)
Answer: D
Mathematics
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Solve the equation by factoring.15x2 + 22x + 8 = 0
A. 
B. 
C. 
D. 
Mathematics
Use a half-angle formula to find the exact value of the expression.cos 
A. - 
B. 
C. 
D. - 
Mathematics
Multiply or divide as indicated.
A. 3i B. -3i C. 3 D. -3
Mathematics
Solve.The formula D = 16t2 is used to approximate the distance in feet an object falls in t seconds. A package is dropped from an airplane that is 3600 feet above the ground. How many seconds elapse before it hits the ground?
A. 15 seconds B. 225 seconds C. 30 seconds D. 57,600 seconds
Mathematics