Abiased sample is one in which every member of the group has an equal chance of being chosen. true or false?

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.

Typically a point in a three dimensional cartesian coordinate system is represented by which of the following answers in the picture !

Find the area of just the wood portion of the frame. this is called a composite figure. you will need to use your values from problem #2need all exepct 4 answerd if you can