That is B.
Reflection in y-axis taking the Point A to (-1,3)
then 2 units to the left.
You would divide the amount remaining by amount per packet to get you answer.
9425/100=94.25
but because you want only unopened packets ignore the decimal
The answer is you have 94 unopened packets.
<u>Answer : </u>
The value of r in (4,r),(r,2) so that the slope of the line containing them is
is 7
<u>Solution: </u>
Slope of the line which is passes through ![\left(\mathrm{x}_{1}, \mathrm{y}_{1}\right) \text { and }\left(\mathrm{x}_{2}, \mathrm{y}_{2}\right) \text { is }](https://tex.z-dn.net/?f=%5Cleft%28%5Cmathrm%7Bx%7D_%7B1%7D%2C%20%5Cmathrm%7By%7D_%7B1%7D%5Cright%29%20%5Ctext%20%7B%20and%20%7D%5Cleft%28%5Cmathrm%7Bx%7D_%7B2%7D%2C%20%5Cmathrm%7By%7D_%7B2%7D%5Cright%29%20%5Ctext%20%7B%20is%20%7D)
→ (1)
From question given that two points are (4, r), (r, 2). Hence we get ![x_{1}=4 ; x_{2}=r ; y_{1}=r ; y_{2}=2](https://tex.z-dn.net/?f=x_%7B1%7D%3D4%20%3B%20x_%7B2%7D%3Dr%20%3B%20y_%7B1%7D%3Dr%20%3B%20y_%7B2%7D%3D2)
By substituting the values in equation (1),
→ (2)
Also given that slope that is m =
, so on substituting the value of m in equation (2),
![-\frac{5}{3}=\frac{2-r}{r-4}](https://tex.z-dn.net/?f=-%5Cfrac%7B5%7D%7B3%7D%3D%5Cfrac%7B2-r%7D%7Br-4%7D)
On simplifying,
-5r+20=6-3r
5r-3r=20-6
2r = 14
r =7
Hence value of r is 7.
The 1st one
I need to put more words