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A car dealer sold x used cars and y new cars during May. If the number
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24 Nov 2015, 11:06
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A car dealer sold x used cars and y new cars during May. If the number of used cars sold was 10 greater than the number of new cars sold. Which of the following expresses this relationship ?
(A) x > 10y
(B) x > y + 10
(C) x > y – 10
(D) x = y + 10
(E) x = y – 10
(A) x > 10y
(B) x > y + 10
(C) x > y – 10
(D) x = y + 10
(E) x = y – 10
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Joined: 12 Sep 2015
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Location: Canada
Re: A car dealer sold x used cars and y new cars during May. If the number
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24 Nov 2015, 11:13
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Bunuel wrote:
A car dealer sold x used cars and y new cars during May. If the number of used cars sold was 10 greater than the number of new cars sold. Which of the following expresses this relationship ?
(A) x > 10y
(B) x > y + 10
(C) x > y – 10
(D) x = y + 10
(E) x = y – 10
(A) x > 10y
(B) x > y + 10
(C) x > y – 10
(D) x = y + 10
(E) x = y – 10
The most common INCORRECT answer is E.
Here's one way to avoid this:
Given: x used cars and y new cars
Number of used cars (x) sold was 10 greater than the number of new cars (y) sold
So, x is 10 greater than y
To show their relative sizes let's write x LARGER than y to get: x and y
Our goal is to create an EQUATION. So, how do we make these two values EQUAL?
Well, we need to make the smaller value (y) bigger. 10 bigger to be exact.
So, we get x = y + 10
Answer: D
Cheers,
Brent
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Re: A car dealer sold x used cars and y new cars during May. If the number
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24 Nov 2015, 11:16
Let number of used cars sold in May = x
number of new cars sold in May = y
x= y + 10
Answer D
number of new cars sold in May = y
x= y + 10
Answer D