Simplify the expression. Assume that all variables represent non-negative real numbers.
+ 2
- 7
A. -5
B. -21
C. -5
D. -21
Answer: D
Mathematics
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Use the distance formula to find the distance between the points.(-6, -5), (6, 5)
A. 2
B. 2
C. 44
D. 44
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Solve the problem.Amy has 3 blue, 4 red, and 5 green books to arrange on a shelf. In how many ways can the books be arranged if books of the same color are identical and must be grouped together?
A. 6 B. 150 C. 103,680 D. 17,280
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Solve the problem.If sin ? = 0.4, find sin (? + ?).
A. -0.6 B. 0.6 C. 0.4 D. -0.4
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Multiply 
and write the result in simplest form.
A. 
B. 
C. 
D. 
E. 
Mathematics