Clasify triangle abc by its angles if m

Okay so i didn't get this problem petro bought 8 tickets to a basketball game he paid a total of $200 write an equation to determine whether each ticket cost $26 or $28 so i didn't get this question so yeahyou have a good day.

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

What is the absolute value of -100000000000000?