Answer:
![y=1.94x](https://tex.z-dn.net/?f=y%3D1.94x)
13 glue sticks cost $25.22.
Step-by-step explanation:
4 blue sticks cost $7.76, this means that one glue stick costs
$7.76/4 = $1.94.
Let
be the cost of the glue sticks, and
be the number of glue sticks; then
![\boxed{y=1.94x}](https://tex.z-dn.net/?f=%5Cboxed%7By%3D1.94x%7D)
We can use this equation to find the cost of 13 glue sticks; we just put
into our equation and it gives:
![y=1.94(13)=25.22](https://tex.z-dn.net/?f=y%3D1.94%2813%29%3D25.22)
So 13 glue sticks cost $25.22.
use this equation to solve for the surface area.
A=2(w+l+hl +hw)
w stands for width
l stands for length
h stands for height
You cannot solve one equation with 3 variables. In this case you have an infinity of results. <span />
To set up the equation you would take x and add the nine pounds that Charlie weighs more than his brother and the set that equal to 99. Your equation would be X+9=99. If you wanted to take it a step further and solve the equation you would distract 9 from both sides which means that x=90
A number is :
![x](https://tex.z-dn.net/?f=x)
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Three quarters of it means :
![\frac{3}{4}x \\](https://tex.z-dn.net/?f=%20%5Cfrac%7B3%7D%7B4%7Dx%20%5C%5C%20%20)
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Decrease by 20 means :
![\frac{3}{4}x - 20 \\](https://tex.z-dn.net/?f=%20%5Cfrac%7B3%7D%7B4%7Dx%20-%2020%20%5C%5C%20%20)
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Equals to 82 means :
![\frac{3}{4}x - 20 = 82 \\](https://tex.z-dn.net/?f=%20%5Cfrac%7B3%7D%7B4%7Dx%20-%2020%20%3D%2082%20%5C%5C%20%20)
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What is that number ?
x asked so we must solve the above equation for x.
Let's do it....
![\frac{3}{4}x - 20 = 82 \\](https://tex.z-dn.net/?f=%20%5Cfrac%7B3%7D%7B4%7Dx%20-%2020%20%3D%2082%20%5C%5C%20%20)
Plus sides 20
![\frac{3}{4}x = 82 + 20 \\](https://tex.z-dn.net/?f=%20%5Cfrac%7B3%7D%7B4%7Dx%20%3D%2082%20%2B%2020%20%5C%5C%20%20)
![\frac{3}{4}x = 102 \\](https://tex.z-dn.net/?f=%20%5Cfrac%7B3%7D%7B4%7Dx%20%3D%20102%20%5C%5C%20%20)
Multiply sides by 4
![3x = 102 \times 4](https://tex.z-dn.net/?f=3x%20%3D%20102%20%5Ctimes%204)
Divided sides by 3
![x = \frac{102 \times 4}{3} \\](https://tex.z-dn.net/?f=x%20%3D%20%20%5Cfrac%7B102%20%5Ctimes%204%7D%7B3%7D%20%5C%5C%20%20)
![x = \frac{102}{3} \times 4 \\](https://tex.z-dn.net/?f=x%20%3D%20%20%5Cfrac%7B102%7D%7B3%7D%20%5Ctimes%204%20%5C%5C%20%20)
Simplify
![x = 34 \times 4](https://tex.z-dn.net/?f=x%20%3D%2034%20%5Ctimes%204)
![x = 136](https://tex.z-dn.net/?f=x%20%3D%20136)
So that number is 136 .
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And we're done.
Thanks for watching buddy good luck.
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