Question

Write an expression for the perimeter of the triangle shown below:

(linked)

A: 10x − 9
B: 10x − 39
C: 5.5x − 9
D: 5.5x + 9
I don't normally ask questions so ill just give 100 points to who can answer this

Answer 1

Perimeter=Sum of three sides

Perimeter:-

`\\ \rm\Rrightarrow 0.3x+24+5x+0.2x-15`

`\\ \rm\Rrightarrow 5.5x+24-15`

`\\ \rm\Rrightarrow 5.5x+9`

Answer 2

The perimeter of the triangle is basically the sum of its sides.

`\rightarrow P = (0.3x + 24) + (5x) + (0.2x - 15)`

Open the parenthesis:

`\rightarrow P = 0.3x + 24 + 5x + 0.2x - 15`

Combine like terms:

`\rightarrow P = x(0.3 + 0.2 + 5) + (24 - 15)`

Simplify the equation:

`\rightarrow P = x(5.5) + (9)`

Further simplify:

`\rightarrow P = 5.5x + 9`

Option D is correct.