The answer would be 9, because 75-12%=66 and then 75-66=9
x + 2y = 4
Slope intercept form is y = mx + b where m = slope and b = y-intercept.
In this case
x + 2y = 4
2y = -x + 4
y = -1/2 x + 2
Answer
Slope intercept form: y = -1/2 x + 2
Just draw a circle, cut it into 4 equal parts, and shade one part. You can do this with other shapes too.
Ok, so first, the y-intercept is always the last number. So the y-intercept for the first equation would be -1, and for the second equation, 4.
Put a dot, or a point on -1and 4 on the graph.
The slope is always he number with an x.
So the slope would be 3 for the first equation.
And the slope for the 2nd equation would be -2.
If the slope doesn't have a denominator, put 1 as it's denominator.
So, 3x would turn into
![\frac{3x}{1}](https://tex.z-dn.net/?f=%20%5Cfrac%7B3x%7D%7B1%7D%20)
And -2x would turn into
![\frac{ - 2x}{1}](https://tex.z-dn.net/?f=%20%5Cfrac%7B%20-%202x%7D%7B1%7D%20)
So the rule for slope is:
![\frac{rise}{run}](https://tex.z-dn.net/?f=%20%5Cfrac%7Brise%7D%7Brun%7D%20)
So, go to your -1, and go up 3 and 1 right. Keep doing that until you reach the end of the graph.
Now, go to your -4, go down 2 and go left 1. Keep doing that until you reach the end of the graph.
Now, draw the lines.
I'll show on piece of paper how to do this if you dont get the explanation I gave.
Remember.
positive number x positive number = positive number
positive number x negative number = negative number
negative number x positive number = negative number
negative number x negative number = positive number
So if both numbers have the same sign, either both positive or both negative, then the product will be positive.