The total number of cars in the garage and the 9 cars outside

Solve for n? [tex]z = \frac{3}{4} mn[/tex]

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

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.