How do i reduce bigger fractions step by step?

(i'm studying for my ged, and i've always struggled with reducing.)

If t8 = 4 and t12 = −2, find the first three terms of the arithmetic sequence.

Afootball quarterback has two more chances to throw a touchdown before his team is forced to punt the ball. he misses the receiver on the first throw 25% of the time. when his first throw is incomplete, he misses the receiver on the second throw 15% of the time. what is the probability of not throwing the ball to a receiver on either throw?

What is the domain of the function y=3 ln x graphed below?