Use the power rules to simplify the expression. Use positive exponents to write the answer.
-3
A. 
B. - 
C. 
D. - 
Answer: B
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Use the elimination method by addition to find the solution for the following system.
A. x = -7, y = -5 B. x = 7, y = -4 C. x = 7, y = -5 D. The system is inconsistent.
Add the real numbers. Write any improper fraction as a whole or mixed number where appropriate.253.82 + 18.34
A. 272.16 B. 272.05 C. 272.15 D. 272.06
Find sin ?, cos ?, tan ?, csc ?, sec ?, and cot ? for an acute angle ? in a right triangle. It is not necessary to find the measure of ?.sec ? = 
A. sin ? = 
cos ? = 
tan ? = 
csc ? = 
sec ? = 
cot ? = 
B. sin ? = 
cos ? = 
tan ? = 
csc ? = - 
sec ? = - 
cot ? = - 
C. sin ? = 
cos ? = 
tan ? = 
csc ? = 
sec ? = 
cot ? = 
D. sin ? = 
cos ? = 
tan ? = 
csc ? = 
sec ? = 
cot ? = 
Find the center of mass of the given system of point masses.
6
? 8
? 7
? 1
? 3
?
?
A. 
, 
B. ?
, 
C. ?
, 
D. ?
, 
E. ?
, 