Solve the problem.Find the number of units that must be produced and sold in order to yield the maximum profit, given the following equations for revenue and cost:R
= 6xC
= 0.01x2 + 1.2x + 90.
A. 720 units
B. 360 units
C. 240 units
D. 480 units
Answer: C
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Write the Indo-Arabic equivalent for the following.
A. 6020 B. 62 C. 6200 D. 620
Solve and check your answer.b - 5 = 14
A. -9 B. 9 C. 19 D. -19
Solve the system by elimination.-6x + 7y = 18 2x + 4y = -6
A. ? B. {(-4, 1)} C. {(-3, 1)} D. {(-3, 0)}
Solve the problem.The cost, in dollars, of cellular phone service with Econo-phone is given by 
where x is the number of minutes used in one month. Find the slope and y-intercept of the equation and explain what each signifies.
A. 11.80 signifies the cost per minute, and 0.58 signifies the monthly service charge. B. 0.58 signifies the cost per minute, and 11.80 signifies the monthly service charge. C. 11.80 signifies the total phone bill, and 0.58 signifies the number of minutes used. D. 0.58 signifies the hourly phone rent, and 11.80 signifies the cost of the hardware.