4x-2y=8 ==> y=2x-4 (to better show you what I mean)
2 lines are parallel if they have the same slope (m the coefficient of x).
So y=mx + b // y =2x-4 means m=2 & y=mx + b, becomes y=2x + b.
Moreover they are telling us that this function passes by (-2,1), where -2 represents x & 1, represents y. To calculate b , replace x & y by their values:
y=2x+b ==> 1 = 2(- 2) + b==> 1 = -4 + b ==> b= 5. Finally the equation is
y=-2x+5
Y because if you add them you will get 10x =-10
The y will be eliminated because you have positive 3 -4
Answer:
72 gallons
Step-by-step explanation:
we know that
19 units represent 228 gallons
so
using proportion
Find out how many gallons represent 6 units
Let
x ---> the number of gallons for 6 units
![\frac{228}{19}\ \frac{gallons}{units} =\frac{x}{6}\ \frac{gallons}{units}\\\\x=228(6)/19\\\\x=72\ gallons](https://tex.z-dn.net/?f=%5Cfrac%7B228%7D%7B19%7D%5C%20%5Cfrac%7Bgallons%7D%7Bunits%7D%20%3D%5Cfrac%7Bx%7D%7B6%7D%5C%20%5Cfrac%7Bgallons%7D%7Bunits%7D%5C%5C%5C%5Cx%3D228%286%29%2F19%5C%5C%5C%5Cx%3D72%5C%20gallons)
I think it should be 6000 more! If not im so sorry!! Have a nice day!!