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egoroff_w [7]
4 years ago
15

solve the following word problem. use x for the unknown value. the average cost of a car in 2013 is said to be 5 less than twice

the cost of a car in 2009. if the average cost of a car in 2013 is $25,000. how much was the average cost of a car in 2009?
Mathematics
1 answer:
Rashid [163]4 years ago
7 0
Let the average cost of car in 2009 be $x, then the average cost of a car in 2013 is 2x - 5
25,000 = 2x - 5
2x = 25,000 + 5 = 25,005
x = 25,005/2 = $12,502.50
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The second package:

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The 10-pack costs $1.54 per bar and the 12-pack costs $1.28 per bar.  The 12-pack has the better price per bar.

Now, let's look at the price per ounce.  We do this in a similar way.  We find the total amount of ounces in the package, and divide the price by the number of ounces.

In the first package, we multiply 10*2.1=21.  We have 21 ounces in the first package.  Now we divide 15.37/21.  In the first package, we have 0.73 dollars per ounce.

Now, let's look at the second package.  We start by multiplying 1.4*12=16.8.  There are 16.8 ounces in the package.  Now, we divide 15.35/16.8=0.91.  So, in the second package, we have 0.91 dollars per ounce.

The cost per ounce of the 10-pack is $0.73 and the cost per ounce of the 12-pack is $0.91.  The first package has the better price per ounce.

The better explanation is the second one, because I prefer the lower price per ounce, I think that the 1st pack is the better buy.
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3 years ago
The larger of two consecutive odd integers is three times the smaller. What is their sum?
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Their sum is 4

Hope this helps :)
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Step-by-step explanation:

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