I'LL GIVE BRAINLIEST I need help on these questions. This test is annoying and I just want to get it done ,_,

QUESTIONS ARE ATTATCHED BELLOW:

It takes jonas 7 1/4 minutes to run the mile. it takes mario 8 5/12 to run the mile. how much faster is jonas than mario? 5/6 minute 1 1/3 minutes 1 1/6 minutes 1 1/2 minutesi will give points and brainlest

Suppose that sahil knows that 45 people with ages of 18 to 29 voted. without using a calculator, he quickly says then 135 people with ages of 30to 49 voted. is he correct? how might sohil have come up with his answer so quickly?

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)