Answers for 9,10, and 11. Also for 11 it asks “Are the triangles congruent? If yes, explain your reasoning and write a congruency statement.

For the equations below which statement is true ?

Adrawer contains 12 identical white socks, 18 identical black socks and 14 identical brown socks. what is the least number of socks you must choose, without looking, to be certain that you have chosen two socks of the same colour?

Twelve less than a number is at most 20