Simplify the expression. Assume that all variables represent non-negative real numbers.5
- 2
- x
A. 14x2
- x
B. 13x
C. 14x
D. 2x
Answer: B
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Rwhere R is the parallelogram bounded by the lines 
A. 
B. 
C. 741
D. 
Determine whether or not the graph is a graph of a function of x.
A. Function B. Not a function
Solve the problem.A merchant has coffee worth $4 a pound that she wishes to mix with 7 pounds of coffee worth $7 a pound to get a mixture that can be sold for $5 a pound. How many pounds of the $4 coffee should be used?
A. 7 lb B. 14 lb C. 21 lb D. 10.5 lb
Write the fraction.According to a recent study, 10 out of 18 visits to a hospital emergency room were for an injury. What fraction of emergency room visits are NOT injury-related?
A. 
B. 
C. 
D. 