<span>In general, if the pyramid has 'x' sides, then it will have 'x' lateral faces. Total Number of Faces = Number of Base Faces + Number of Lateral Faces. Total Number of Faces = 2 + x. So the formula is F=x%2B2 where "x" is the number of sides that the pyramid has and "F" is the total number of faces.</span>
Answer:
Step-by-step explanation:
1 ) Y∝ 1 / X
Y = k / X
Y = 9 , X = -5
Putting the values in the relation above
9 = k / - 5
k = -45
Y = - 45 / X
Put Y = - 6
- 6 = - 45 / X
X = - 45 / -6
= 7.5
2 )
Luke and Nora can peel 12 carrots in 5 minutes
in 1 minute Luke and Nora can peel 12 / 5 carrot
in 1 minute Luke alone can peel 12/ 11 carrot .
In 1 minute Nora alone will peel (12 / 5 - 12/ 11 ) carrot
(12 / 5 - 12 / 11 )
= 2.4 - 1.1
= 1.3 carrot
In 1 minute Nora alone will peel 1.3 carrot
1.3 carrot in 1 minute
8 carrot in 8 / 1.3 minute
= 6.15 minutes.
In 1 minute Nora alone will peel 8 carrot in 6.15 minutes working alone.
I believe 10% because 390 and 39 are exactly the same numbers almost
Here the line passes through (0,0) and (1,3).
First we need to find the slope , and for that we need to use the following formula
![m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}](https://tex.z-dn.net/?f=%20m%3D%5Cfrac%7By_%7B2%7D-y_%7B1%7D%7D%7Bx_%7B2%7D-x_%7B1%7D%7D%20%20)
On substituting the values from the point, we will get
![m=\frac{3-0}{1-0}=3](https://tex.z-dn.net/?f=%20m%3D%5Cfrac%7B3-0%7D%7B1-0%7D%3D3%20%20)
Now we will use slope intercept form, which is
![y = mx+ b](https://tex.z-dn.net/?f=%20y%20%3D%20mx%2B%20b%20)
Where m is the slope and b is the y intercept
And on substituting the values of x and y from the point (1,3) and slope, m = 3, we will get
![3 = 3(1)+b](https://tex.z-dn.net/?f=%203%20%3D%203%281%29%2Bb%20)
![3=3+b](https://tex.z-dn.net/?f=%203%3D3%2Bb%20)
b =0
Substituting the values of m and b in the slope intercept form, we will get
![y= 3x](https://tex.z-dn.net/?f=%20y%3D%203x%20)
You don’t have any attachment so I’m sorry I cannot answer