Perform the indicated operation and express in lowest terms. ? 

A.  
B.
C.  
D.  


Answer: C

Mathematics

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Write the vector in the form ai + bj. 

A. 9i + 2j B. -2i + 9j C. 9i - 2j D. 2i + 9j

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Simplify the radical. Assume that all variables represent positive real numbers.

A. 2x
B. 2x 
C. x
D. 2x

Mathematics

Graph the linear function. Give the domain and range.f(x) = 4x + 6

A. Domain: (-?, ?); range: (-?, 6)

B. Domain: (-6, 6); range: (6, 6)

C. Domain: (-?, ?); range: (-?, ?)

D. Domain: (-?, ?); range: (-?, ?)

Mathematics

Write a system of inequalities that describes the possible solutions to the problem.The Acme Class Ring Company designs and sells two types of rings: the VIP and the SST. The company can produce up to 140 rings each day, using up to 350 total man-hours of labor. It takes 5 man-hours to make one VIP ring and 7 man-hours to make one SST ring. Let x represent the number of VIP rings, and let y represent the number of SST rings. Including the system inequalities  and , find the remaining inequalities that best describe this company's ring production.

A. x ? 140, y ? 140, 7x + 5y ? 350 B. x + y ? 140, 7x + 5y ? 350 C. x + y ? 140, 5x + 7y ? 350 D. x ? 140, y ? 140, 5x + 7y ? 350

Mathematics