A principal orders t-shirts and wants to check some of them to make sure they were printed properly, she randomly selects 7 of the 10 boxes and checks 20 in one box and 40 in others. What type of sampling is this?

Randomized.

Step-by-step explanation:

x = 17

step-by-step explanation:

in the given figure, two triangles are inscribed in a circle where ∠bae ≅ ∠dae which makes the side be and de equal so we can write it as:

3x - 24 = x + 10

solving this equation for x to get:

3x - x = 10 + 24

2x = 34

x = 34/2

x = 17

therefore, the value of x = 17.