Hey there,
You could solve it in one of three ways: graphing, substitution method, and elimination method.
:)
10. 4y + 2
11. 7x
i will put the other two in a bit something happened to my thing that it only lets me write some things
Perimeter is when you add the outside of a shape.
For example: if you are finding the perimeter of a rectangle the formula is P= l+w+l+w. I hope this helps !
There are 13 angles.
We know that

and

(11 angles)
1.

(9 angles)
2.

(8 angles)
3.

(7 angles)
4.

(6 angles)
5.

(5 angles)
6.

(4 angles)
7.

so we have a parallelogram.

(3 angles)

(2 angles)
8.

(1 angle)
9.
Answer:
3)
Step-by-step explanation:
AB = AC = BC
In equilateral triangle, all the sides and angles are equal. Here the diagram is constructed using the sides.