Question

What is the length of side OR?A:6 unitsB:8 unitsC:10 units D:18 units

Answer 1

The perimeter is the sum of all sides, therefore:

`P=(2x+4)+(x)+(3x+3)`

Since the perimeter is 55 units:

`55=2x+4+x+3x+3`

Add like terms:

`55=6x+7`

Solve for x:

`\begin{gathered} 55-7=6x \\ 48=6x \\ x=(48)/(6) \\ x=8 \end{gathered}`

Answer:

x = 8