SOMEONE HELP ME LOL IM SO OVERWHELMED

1. what are the missing reasons in the proof 2. it's in the second picture and 3

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

Olive's solar powered scooter travels at a rate of 30 miles per hour. what equation can she use to calculate her distance with relation to the time she traveled? h=hours m=miles 1. h=m+30 2. m=30h 3. m=h+30 4. h=30m