Profit = Revenue - Cost)
A. - - x + 110
B. - - x + 110
C. - + x - 110
D. - + x - 110
Answer:C
Profit = Revenue - Cost)
A. - - x + 110 B. - - x + 110 C. - + x - 110 D. - + x - 110
Explanation: C Whenever there are variables in the question and in the answers, think Plugging In. If x = 10, then C = 110 + = 110 + 5 = 115 and R = 15 (10) - = 150 - = 150 - 10 = 140. Therefore, the profit can be calculated as 140 - 115 = 25. Plug 10 in for x in the answers to see which answer equals the target number of 25. Choice (A) becomes - - (10) + 110 = - - 31 (5) + 110 = -10 - 155 + 110 = -55. This doesn't match the target number, so eliminate (A). Choice (B) becomes - - (10) + 110 = - - 29(5) + 110 = -10 - 145 + 110 = -45. Eliminate (B). Choice (C) becomes - + (10) - 110 = - + 29(5) - 110 = -10 + 145 - 110 = 25. Keep (C), but check (D) just in case it also works. Choice (D)becomes - + (10) - 110 = - + 31(5) - 110 = -10 + 155 - 110 = 35. Eliminate (D) and choose (C).