Find the product.(5x - y + 4z)(5x - y - 4z)
A. 25x2 + y2 + 40xz + 8yz - 16z2
B. 25x2 - 10xy + y2 + 40xz + 8yz - 16z2
C. 25x2 + y2 - 16z2
D. 25x2 - 10xy + y2 - 16z2
Answer: D
Mathematics
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Evaluate or simplify the expression without using a calculator.log 1000
A. 
B. 30
C. 
D. 3
Mathematics
Solve the problem.The following graph approximates the average monthly cable TV rates, in dollars, since 1980. The equation of this graph is given by R = -0.0036t3 + 0.13t2 - 0.073t + 7.7 
Use the graph to approximate the domain and range of the function.
A. Domain: [0, ?), Range: [0, 36] B. Domain: [0, 27], Range: [8, 31] C. Domain: [8, 31], Range: [0, 27] D. Domain: (-?, ?), Range: [0, 32]
Mathematics
Evaluate.
A. -70 B. -10 C. -30 D. 30
Mathematics
Evaluate as requested.Given that f(x) = 4
+ 4x, find f(6y).
A. 23
+ 26y
B. 24
+ 24y
C. 6
+ 6y
D. 4
+ 4y
Mathematics