Answer:


Step-by-step explanation:
we know that
The area of rectangle is equal to

where
L is the length of rectangle
W is the width of rectangle
In this problem we have

substitute

Apply distributive property


B=30. all you have to do is minus 9 from both sides then multiply 6 to each side so all thats left is the variable
So my understanding from this you have to make it y = mx + b so m stands for the slope there’s different ways to find it as shown in the first picture. I’ll try to make another comment since this only lets me take one picture at a time.
I tried my best for this I’m pretty for sure I remember doing this in school but I’m not for sure I hope this helped a little bit