Evaluate the expression by hand. Variables represent any real number.
A. 4x
B. 2x2
C. 6x6
D. 4x2
Answer: D
Mathematics
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Find the LCM of the set of numbers.10, 15
A. 150 B. 15 C. 30 D. 25
Mathematics
Solve the problem.The speed of a stream is 4 mph. If a boat travels 
downstream in the same time that it takes to travel 
upstream, what is the speed of the boat in still water?
A. 14 mph B. 12 mph C. 8 mph D. 15 mph
Mathematics
Assuming all variables are positive, use properties of logarithms to write the expression as a sum or difference of logarithms or multiples of logarithms.ln x3y4
A. ln (3x)+ ln (4y) B. 3ln x + 4ln y C. ln (3x) ? ln (4y) D. ln x3 ? ln y4
Mathematics
Find the range of the given function.f(x) = 2x2 + 8x + 4
A. (-?, 4] B. (-?, 2] C. [-2, ?) D. [-4, ?)
Mathematics