Find the sample size needed to have a margin of error of 5%​

x = 15

Step-by-step explanation:

Vertical angles form when we have an "x" as a geometric figure by 2 lines. The angles created opposite to each other are vertical.

Adjacent angles are side-by-side.

This picture shows adjacent angles.

Also, the two angles shown are a right angle, 90 degrees (shown by the red marked "L").

So, we can say that "4x" and "2x" sums up to 90. Now we write an equation and solve for x. Shown below:

4x + 2x = 90

6x = 90

x = 90/6

x = 15

x is 15