What is an equivalent fraction to 1/2?

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.

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c

If a is a nonzero real number then the reciprocal of a is