Solve the problem.The cost y to produce x digital radios is given by the equation y = 74x + 3360 and the revenue y from the sale of these radios is given by the equation y = 102x. Find the break-even point to determine the cost/revenue when the company breaks even. Round to the nearest dollar, if necessary.
A. $1947
B. $12,240
C. $1233
D. $120
Answer: B
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Perform the indicated operations.(-4 + x)(3x + 2)
A. 3x2 - 8x - 10 B. x2 - 10x - 10 C. 3x2 - 10x - 8 D. 3x2 - 11x - 8
Solve the problem using matrices.John has a jarful of quarters and nickels. There are 109 coins in the jar. The value of the coins is $15.25. How many of each type of coin are there?
A. 104 quarters; 5 nickels B. 49 quarters; 60 nickels C. 54 quarters ; 55 nickels D. 60 quarters; 49 nickels
Find the midpoint of the line segment joining the points A and B.A = (3, 5); B = (9, 3)
A. (-6, 2)
B. 
C. 
D. (12, 8)
Solve the problem.Coffee is best enjoyed at a temperature of 115°F. A restaurant owner wants to discover the temperature T at which he should serve his coffee so that it will have cooled to this ideal temperature in 5 minutes. He discovers that a cup of coffee served at 200°F cools to 180°F in one minute when his restaurant is at 67°F. If he maintains the restaurant temperature at 67°F, at what temperature should he serve the coffee to meet his goal?
A. 170°F B. 175°F C. 200°F D. 195°F