When you GRAPH an equation or inequality you plot all of the points that satisfy it.
<u>1) </u> 
2) Rectangular shape is square shape patio !
<u>Step-by-step explanation:</u>
Here we have , the area of Bianca’s rectangular backyard patio is represented by the expression x2 – 18x + 81, and the length of the patio is represented by the expression x − 9: We need to find
1. what is the expression for the width of the patio? Explain and show all work.
We know that area of rectangle = 
⇒ 
Factorizing RHS:
⇒ 
⇒ 
⇒ 
⇒ 
2. what special rectangular shape is the patio?
Now , we see that

A rectangle whose length & width are equal is known as a square ! Hence , Rectangular shape is square shape patio !
a) To find the missing side length on triangle A, we can use the Pythagorean theorem.
a^2 + 12^2 = 13^2
a^2 + 144 = 169
a^2 = 25
a = 5 cm
5 and 12 = 5 and 12
b) The two triangles are congruent because they have two side lengths in common. If at least two side lengths are the same on two triangles, then they are congruent. In addition, these triangles have one angle in common as well.
Hope this helps!! :)
36 divided by s. With s representing the number of shelves.