Show Sally How it is Done! What is the Correct Answer? Step 1 3a2+4a2−a2

Step 2 7a2−a2

Sally's Answer 8a2

whats the correct answer

Alex took his brother to a birthday party. the party was scheduled to last for 1 and 3/4 hours but they stayed for 4/5 of an hour more. how long did she stay at the party?

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.

Given δjkl : δxyz, find x. a)10 b)12 c)16 d)20