Match the system of inequalities with a graph.4y - x > -28,y + 3x < 15,x > 0,y < 0
A. 
B. 
C. 
D. 
Answer: C
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Solve the problem.Bob owns a watch repair shop. He has found that the cost of operating his shop is given by 
where x is the number of watches repaired. How many watches must he repair to have the lowest cost?
A. 87 watches B. 20 watches C. 43 watches D. 50 watches
Graph the function by hand. Then use a graphing calculator to verify your graph. Find the domain and range of the function.f(x) = 8
x
A. domain: all real numbers;
range: y > 0
B. domain: all real numbers;
range: y < 0
C. domain: all real numbers;
range: y < 0
D. domain: all real numbers;
range: y > 0
Write the number as an exponential expression, using the base shown. Check your result with a calculator.
(base 10)
A. 210 B. -102 C. 102 D. 10-2
Perform the indicated operation.71.86 + 1.258 + 1.147 + 1.27
A. 76.535 B. 75.635 C. 75.535 D. 75.545