Answer:
Each friend ate 4 tacos.
Step-by-step explanation:
"4 of his friends ate s tacos" is unclear. I assume it should be
"4 of his friends ate s tacos each."
total tacos = 2 + 4s = 18
4s = 16
s = 4
His four friends ate a total of 16 tacos, each friend eating 4 tacos.
Ricky's reason, i.e., that 6s = 18, is incorrect.
6s = 4s+2s, where 4s is what his friends ate in total.
That implies that Ricky ate 2s tacos, instead of 2 tacos. If 2s = 2 then s = 1, but then 6s ≠ 18.
Gosh, when I saw that my mind went blank
<span>y=−3x+2</span> is a linear equation in slope-intercept form with
slope <span>m=<span>(−3)</span></span>
(and y-intercept <span>=2</span>)
We want the equation of a line with slope <span>m=<span>(−3)</span></span> through the point <span>(<span>−2</span>,<span>−8</span>)</span>
Using the point-slope linear equation form:
<span><span>(y−<span>(−8)</span>)</span>=<span>(−3)</span><span>(x−<span>(−2)</span>)</span></span>
Simplifying
<span>y+8=−3x−6</span>
or, in standard form
<span>3x+y=−<span>14</span></span>
Answer:
The ratio of AC/CB=1/3
Step-by-step explanation:
We use the section formula:
![(\frac{mx_2+nx_1}{m+n},\frac{my_2+ny_1}{m+n})](https://tex.z-dn.net/?f=%28%5Cfrac%7Bmx_2%2Bnx_1%7D%7Bm%2Bn%7D%2C%5Cfrac%7Bmy_2%2Bny_1%7D%7Bm%2Bn%7D%29)
We substitute the point A(-1.5,0) and B(4.5,8).
We plug in the points to get:
![(\frac{4.5m - 1.5n}{m+n},\frac{8m+n \times 0}{m+n})](https://tex.z-dn.net/?f=%28%5Cfrac%7B4.5m%20-%201.5n%7D%7Bm%2Bn%7D%2C%5Cfrac%7B8m%2Bn%20%5Ctimes%200%7D%7Bm%2Bn%7D%29)
This is supposed to be equal to: (0,2).
![(\frac{4.5m - 1.5n}{m+n},\frac{8m+n \times 0}{m+n}) = (0,2)](https://tex.z-dn.net/?f=%28%5Cfrac%7B4.5m%20-%201.5n%7D%7Bm%2Bn%7D%2C%5Cfrac%7B8m%2Bn%20%5Ctimes%200%7D%7Bm%2Bn%7D%29%20%3D%20%280%2C2%29)
We can equate, corresponding coordinates to find m and n.
![\frac{4.5m - 1.5n}{m + n} = 0](https://tex.z-dn.net/?f=%20%5Cfrac%7B4.5m%20-%201.5n%7D%7Bm%20%2B%20n%7D%20%20%3D%200)
This implies that:
![4.5m - 1.5n = 0](https://tex.z-dn.net/?f=4.5m%20-%201.5n%20%3D%200)
![4.5m = 1.5n](https://tex.z-dn.net/?f=4.5m%20%20%3D%201.5n)
![\frac{m}{n} = \frac{1.5}{4.5}](https://tex.z-dn.net/?f=%20%5Cfrac%7Bm%7D%7Bn%7D%20%20%3D%20%20%5Cfrac%7B1.5%7D%7B4.5%7D%20)
![\frac{m}{n} = \frac{1}{3}](https://tex.z-dn.net/?f=%5Cfrac%7Bm%7D%7Bn%7D%20%20%3D%20%20%5Cfrac%7B1%7D%7B3%7D%20)
Therefore the ratio is m:n=1:3