Can someone help me with this problem

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 adds to be the bottom number but also multiplies to be the top number with 8 on the bottom and 15 on top

Write the slope intercept equation for line ab.