Hi All,
This question can be solved conceptually (with Algebra) or by TESTing VALUES.
We're told that a taxi charges D DOLLARS for the first 2 MILES and C CENTS per QUARTER-MILE for every mile after the first 2 miles. Which equation describes cost of a taxi ride of N miles in dollars.
IF....
D = 2 dollars
C = 3 cents
N = 3 miles
A 3-mile trip would cost 2 dollars (for the first 2 miles) + 3(4) = 12 cents for the 4 additional quarter-miles.
Total price (in dollars) = 2.12
Answer A: dn – c/8(100) = (2)(3) - 3/800 = 6 - 3/800 NOT a match
Answer B: cd + 4n-8/200 = (3)(2) + 4(3)/200 = 6 + 12/200 NOT a match
Answer C: d + (4cn-8c)/100 = 2 + (36 - 24)/100 = 2.12 This IS a MATCH
Answer D: d + 100cn/4 = 2 + 900/4 NOT a match
Answer E: 4cd(n-2) – 100 = 24(1) - 100 NOT a match
Final Answer:
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