Jason sold half of his comic books and then bought 6 more. He now has 13. How many did he begin with?

The weights of players in a basketball league are distributed normally. the distance (d) of each player's weight (w) from the mean of 86 kilograms was computed as follows: d = |w - 86| if d is greater than 7 for approximately 5% of the players, what is the approximate standard deviation of the players' weights? a. 1.75 kilograms b. 3.5 kilograms c. 4.3 kilograms d. 7 kilograms

The sum of two numbers is 86, and their difference is 20. find the two numbers

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.