Multiply by a fraction equivalent to 1 to build up the fraction to one with the denominator shown.
= 
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Perform the indicated operation. Simplify if possible.
+ 
A. 
B. 
C. 
D. 
Mathematics
If possible, solve the system of equations. Use any method. If there is not a unique solution to a system, say why.2x - 6y = 5-12y = 10 - 4x
A. (2, -6) B. (0, 0) C. Infinite number of solutions; dependent equations D. No solution; inconsistent system of equations
Mathematics
Find the exact value of y, or state that y is undefined.y = cos-1 
A. 
B. 
C. - 
D. 
Mathematics
Solve the problem.The formula 
represents the number of households N, in thousands, in a certain city that have a computer x years after 2010. According to the formula, in what year would there be 109 thousand households with computers in this city?
A. 2017 B. 2018 C. 2016 D. 2015
Mathematics