First, distribute what's inside the parenthesis, and change all the subtractions to addition of negatives.
18 + -2 (x^2 + - 5x)
Next distribute the -2
18 + -2x^2 + 10x
Then I like to rearrange stuff to put it in standard form.
-2x^2 + 10x + 18
Answer:
X = -3.5
Step-by-step explanation:
<h2>
Answer:</h2>
First, we need to use <u><em>slope formula*</em></u> to find the slope.

Second, we use the slope we found and <em>ONE</em> of the 2 points listed and plug it into <u><em>slope-intercept form**</em></u> to solve for <u><em>b</em></u>.
Here is what we have so far:
I'm going to use this point:
Here is how to find <em>b</em>:

Finally, we put all of it together and we have our equation.

*Slope formula: <em>m = y₂ - y₁/x₂ - x₁</em>
**Slope-intercept form: <em>y = mx + b</em>
<em></em>
Let's move all to one side:
6r+7-13-7r=0
and re-arrange to have similar terms together:
6r-7r +7-13=0
let's add up what we can:
-1r-6=0
we can move the -6 to the other side and multiply both sides by -1 and we get:
r=-6 This is the<em> solution. </em>