If a radius of a circle is perpendicular to a chord, then it that chord.

a. is equal in length to
b. bisects
c. is congruent to
d. parallels

Due to bad planning, two of the local schools have their annual plays on the same weekend. while 457 people attend one, and 372 attend the other, only 104 people were able to attend both. how many people went to at least one play?

Could someone me with this question i’ve been stuck on it for 20 minutes

For the sequence [tex]a_{n} = 2n/(n+1)[/tex], what is the value of [tex]a_{10}[/tex]