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asambeis [7]
3 years ago
15

A store sells shirts at three prices only: $25, $30, and $35. How many different combinations are possible for the store to sell

20 shirts for a total of $600?
Mathematics
1 answer:
Dvinal [7]3 years ago
5 0

Answer:

  11

Step-by-step explanation:

The average price of the 20 shirts is 600/20 = $30 each. So, we know that we can sell 20 shirts for $30 each to reach the goal.

For each $25 shirt we sell, we must also sell a $35 shirt to make the average price of the sale be $30 per shirt. That is any or all of the 10 pairs of $30 shirts can be replaced by a ($25, $35) pair. So, there are 10 additional ways to reach the goal.

The total number of possible combinations of shirt sales is 1 +10 = 11.

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The difference of two numbers is 16 and the sum of their squares is 130. What are the numbers.
Korvikt [17]
x - y = 16
x^2 + x^2 = 130

----------------
x^2 - y^2 = 256
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2x^2 = 386
x^2 = 193
x = <span>13.892 (3DP)
----
</span>x - y = 16
13.892 - y = 16
-y = 2.108
y = -2.108
The numbers are: 13.892 and -2.108
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Can someone tell me about proportions??? PLEASE I NEED HELP ASAP
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3 years ago
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gladu [14]

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Sveta_85 [38]

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pychu [463]

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Step-by-step explanation:

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So we know that in zero years the stamp was worth $420 because that is the time Sheri gave her brother Sam the stamp. That could bring up the coordinates  (0,420) .

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