11-x=x-3 pls help me quickly you have to write it out its middle school

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?

Which property was used to simplify the expression? 3c+9 +4c=3c+4c+9

Awoman has 14 different shirts: 10 white shirts and 4 red shirts. if she randomly chooses 2 shirts to take with her on vacation, then what is the probability that she will choose two white shirts? show your answer in fraction and percent, round to the nearest whole percent.