In a race in which six automobiles are entered and there are not ties, in how many ways can the first four finishers come in?

With number 11 ( show how you got the answer)

Suppose m: angle a =77 degrees what is the measure of a complement of a complement of angle a, what is a conclusion you can draw about a complement of a complement of an angle

What is the area of this parallelogram? 434.28 cm2 263.67 cm2 527.34 cm2 217.14 cm2