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Feliz [49]
2 years ago
5

A store sells​ tents, sleeping​ bags, and camp stools. A customer buys a​ tent, 3 sleeping​ bags, and 4 camp stools for ​$170. T

he price of the tent is 9 times the cost of a camp stool. The cost of a sleeping bag is ​$30 more than the cost of a camp stool. Find the cost of each item.
Mathematics
2 answers:
olya-2409 [2.1K]2 years ago
7 0

Answer: the cost of a tent is $45

the cost of a sleeping bag is $35

the cost of a camp stool is $5

Step-by-step explanation:

Let x represent the cost of a tent.

Let y represent the cost of a sleeping bag.

Let z represent the cost of a camp stool.

A customer buys a​ tent, 3 sleeping​ bags, and 4 camp stools for ​$170. It means that

x + 3y + 4z = 170- - - - - - - - - - - - - - -1

The price of the tent is 9 times the cost of a camp stool. It means that

x = 9z

The cost of a sleeping bag is ​$30 more than the cost of a camp stool. It means that

y = z + 30

Substituting x = 9z and y = z + 30 into equation 1, it becomes

9z + 3(z + 30) + 4z = 170

9z + 3z + 90 + 4z = 170

9z + 3z + 4z = 170 - 90

16z = 80

z = 80/16

z = 5

y = z + 30 = 5 + 30

y = 35

x = 9z = 9 × 5

x = 45

Inessa [10]2 years ago
6 0

Answer:

Cost of camp stool is $5 , cost of tent is $45 and cost of sleeping bag is $35

Step-by-step explanation:

Customer buys 1 tent,3 sleeping bags and 4 camp stools.

Let the cost of the camp stool = \[x\]

Then the price of the tent = \[9*x\]

Cost of the sleeping bag = \[x+30\]

The total cost of the items purchased by him is $170

\[=> 9x + 4x + 3(x+30) = 170\]

\[=> 9x + 4x + 3x+90 = 170\]

\[=> 16x = 80\]

\[=> x = 5\]

So cost of camp stool is $5 , cost of tent is $45 and cost of sleeping bag is $35.

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3 years ago
The first term of a geometric sequence is 15, and the 5th term of the sequence is <img src="https://tex.z-dn.net/?f=%5Cfrac%7B24
sladkih [1.3K]

The geometric sequence is 15,9,\frac{27}{5},\frac{81}{25},  \frac{243}{125}

Explanation:

Given that the first term of the geometric sequence is 15

The fifth term of the sequence is \frac{243}{125}

We need to find the 2nd, 3rd and 4th term of the geometric sequence.

To find these terms, we need to know the common difference.

The common difference can be determined using the formula,

a_n=a_1(r)^{n-1}

where a_1=15 and a_5=\frac{243}{125}

For n=5, we have,

\frac{243}{125}=15(r)^4

Simplifying, we have,

r=\frac{3}{5}

Thus, the common difference is r=\frac{3}{5}

Now, we shall find the 2nd, 3rd and 4th terms by substituting n=2,3,4 in the formula a_n=a_1(r)^{n-1}

For n=2

a_2=15(\frac{3}{5} )^{1}

   =9  

Thus, the 2nd term of the sequence is 9

For n=3 , we have,

a_3=15(\frac{3}{5} )^{2}

   =15(\frac{9}{25} )

   =\frac{27}{5}

Thus, the 3rd term of the sequence is \frac{27}{5}

For n=4 , we have,

a_4=15(\frac{3}{5} )^{3}

    =15(\frac{27}{25} )

    =\frac{81}{25}

Thus, the 4th term of the sequence is \frac{81}{25}

Therefore, the geometric sequence is 15,9,\frac{27}{5},\frac{81}{25},  \frac{243}{125}

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Arada [10]

To solve this plug 2 in for d in the equation like so:

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How I found this:

The greatest common factor of 8 and 4 is 4.

If we divide 8 by 4 you get 2

If you divide 4 by 4 you would get 1

That gives you the simplified fraction:

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Now we have the expression:

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^^^ A number subtracted from itself is always zero

The answer is:

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Answer:

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