What is the least common multiple of 3 9 and 15

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.

What are two numbers that have a sum of 15?

Which equation shows an equation equivalent to x^2+12x+7=0