Evaluate 5xyz + 3y for x=2.5, y=12, and z=4

When y’all answer can y’all explain too !

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.

Find the missing factor. write your answer inexponential form.9^2=9^4×