Identify the missing side length using a scale factor of 1.5.

7.5

Step-by-step explanation:

You really don't have to. Set up a Proportion.

3/4.5 = 5/x            Cross multiply

3*x = 4.5 * 5          Combine the right

3x = 22.5              Divide by 3

3x/3 = 22.5/3       Do the division

x = 7.5

However, you could use a scale factor of 1.5

The parent shape has a length of 5

This is multiplied by 1.5

New length = Old length * Scale factor.

New length =

Old length = 5

Scale factor = 1.5

New length =  1.5 * 5 = 7.5

7.5

Step-by-step explanation:

The width on the left rectangle is 3

Multiply it by the scale factor (1.5) and we  get the width of the rectangle on the right

3 * 1.5 = 4.5

Then take the length of the rectangle on the left and multiply it by the scale factor

5 (1.5) = 7.5

The length of the rectangle is 7.5

(23*2)-12=x     x=34

step-by-step explanation: