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5 May, 17:41

Two of the most expensive cars in the world are car A and car B. The prices of these two cars differ by more than $15,000. The price of car A is $131,745. a. Assuming that you do not know which model is more expensive, write an absolute value in equality that describes this situation. Use x for the cost of car B. b. What are the possibilities for the price of car B?

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  1. 5 May, 20:30
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    Step-by-step explanation:

    Part a:

    Price of car A = $131,745 and price of car B is unknown = x

    There are two possible cases: 1) Car A is the more expensive car, and 2) car B is the more expensive one. We start by analyzing both cases separately:

    Case 1) If car A is the more expensive car, we could write the difference in prices in mathematical form, using the "larger than" symbol: ">"

    $131,745 - x > $15,000 that reads : "the price of car A ($131,745) minus the price of car B (x) is MORE THAN (>) $15,000

    Case 2) Car B is more expensive than A, so we can write:

    x - $131,745 > $15,000 that reads: "the price of car B (x) minus the price of car A ($131,745) is MORE THAN (>) $15,000

    Both inequalities that we wrote above can be condense in a single inequality if we use the "absolute value" mathematical symbol thus expressing that the difference between both prices in absolute value must be larger than $15,000:

    | $131,745 - x | > $15,000

    Part b) We can solve for x in the first inequality we wrote:

    $131,745 - $15,000 > x therefore x < $116,745

    and also we can solve for x in the second inequality given us the second possibility:

    x - $131,745 > $15,000 therefore x > $146,745
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