Question

!! MIDDLE SCHOOL 7TH GRADE MATH ACCELERATED HELP PLS !!

Answer 1

3 units

Explanation:

So those two sides are of the same length, meaning, they should equal each other.

Hence

5 - 2x = -4x + 9

Rearrange

-2x + 4x = 9 - 5

Simplify

2x = 4

Divide both sides by two to make x on its own

x = 2

Sub the value two into both side lengths:

5 - 2x --> 5 - 4 = 1

-4x + 9 --> -8 +9 = 1

So we now know the side lengths of two sides, but we need to find the side length of the other one (one at the bottom)

Since it is a regular triangle, it means all sides are of equal length, hence the other side would also equal 1.

To find the perimeter, you have to add all three sides of the triangle:

Hence the perimeter would equal 3 units

Answer 2

3

Explanation:

5-2x=-4x+9

2x=4

x=2

now that you have x. plug it in for one of them

5-4

1.

-4x+9

-8+9

1

so each side is 1.

3 sides. 1(3). the perimeter is 3