Solve.An engineer uses the expression 
to describe the width of a rectangular steel plate she is designing for a machine. The expression 
describes the length. Write a rational expression for the difference of the width and the length.
A. 
- 
B. 
+ 
C. 
D. 
Answer: A
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Find the solution set of the system.
?
?
A. ?
B. ?
C. ?
D. ?
Use common logarithms or natural logarithms and a calculator to evaluate to four decimal placeslog5 13
A. 0.4150 B. 1.8129 C. 0.6275 D. 1.5937
Solve the problem.Kayla, a photographer, can produce prints of her photos at a cost of $3 per print, with a setup cost of $50 per run. She sells the prints for $9 each. Write an equation for the total revenue. Let R represent the total revenue and x represent the number of photos produced. Graph the equation by hand. Use the graph to determine the number of prints sold to obtain a revenue of $50. 
A. R = 3x + 50; -1 prints
B. R = 3x + 50; 0 prints
C. R = 9x; 3 prints
D. R = 9x; 5 prints
Divide.
A. 4x + 4 + 
B. 4x + 4 + 
C. 4x2 + 4 + 
D. 4x2 + 4 + 