40 x 100L which is wrong but i need points
Answer:
![x=-1\\y=-1](https://tex.z-dn.net/?f=x%3D-1%5C%5Cy%3D-1)
Step-by-step explanation:
![5x+5y=-10\\3x-7y=4](https://tex.z-dn.net/?f=5x%2B5y%3D-10%5C%5C3x-7y%3D4)
Let's solve the first equation for either x or y. I'll do it for x.
![5x+5y=-10](https://tex.z-dn.net/?f=5x%2B5y%3D-10)
Begin by subtracting 5y.
![5x=-5y-10](https://tex.z-dn.net/?f=5x%3D-5y-10)
Now divide by 5.
![x=\frac{-5y}{5}-\frac{10}{5}](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-5y%7D%7B5%7D-%5Cfrac%7B10%7D%7B5%7D)
Simplify:
![x=-y-2](https://tex.z-dn.net/?f=x%3D-y-2)
Now substitute x in the second equation for this value.
![3x-7y=4\\3(-y-2)-7y=4](https://tex.z-dn.net/?f=3x-7y%3D4%5C%5C3%28-y-2%29-7y%3D4)
Distribute;
![-3y-6-7y=4](https://tex.z-dn.net/?f=-3y-6-7y%3D4)
Add 6
![-3y-7y=4+6](https://tex.z-dn.net/?f=-3y-7y%3D4%2B6)
Combine like terms;
![-10y=10](https://tex.z-dn.net/?f=-10y%3D10)
Divide by -10.
![y=\frac{10}{-10}\\ y=-1](https://tex.z-dn.net/?f=y%3D%5Cfrac%7B10%7D%7B-10%7D%5C%5C%20y%3D-1)
-----------------------------------------------------------------------------------------------------------
Take this value of y and replace it in the first equation to find the value of x.
![5x+5y=-10\\5x+5(-1)=-10\\5x-5=-10\\5x=-10+5\\5x=-5\\x=\frac{-5}{5}\\ x=-1](https://tex.z-dn.net/?f=5x%2B5y%3D-10%5C%5C5x%2B5%28-1%29%3D-10%5C%5C5x-5%3D-10%5C%5C5x%3D-10%2B5%5C%5C5x%3D-5%5C%5Cx%3D%5Cfrac%7B-5%7D%7B5%7D%5C%5C%20x%3D-1)
Alrighty
we gots 1/4 circle and paralellogram
area circle=pi times radius^2
area paralelogram=base times height
1/4 circle is
radius is 10 so
area part circle is 1/4 times pi times 10^2=100/4pi=25pi=78.5 m²
area paralllogram is
10 times 3 because 3 is height and 10 is base length or 30
30+78.5=108.5 m² is the area
Given :
C, D, and E are col-linear, CE = 15.8 centimetres, and DE= 3.5 centimetres.
To Find :
Two possible lengths for CD.
Solution :
Their are two cases :
1)
When D is in between C and E .
. . .
C D E
Here, CD = CE - DE
CD = 15.8 - 3.5 cm
CD = 12.3 cm
2)
When E is in between D and C.
. . .
D E C
Here, CD = CE + DE
CD = 15.8 + 3.5 cm
CD = 19.3 cm
Hence, this is the required solution.