Im in 8th grade and were learning decimals to a fraction and im stuck

Which equation can be simplified to find the inverse of y = 2x2?

Two fire-lookout stations are 190 miles apart, with station a directly south of station b. both stations spot a fire. the bearing of the fire from station a is upper n 55 degrees upper e and the bearing of the fire from station b is upper s 60 degrees e. how far, to the nearest tenth of a mile, is the fire from each lookout station?

What is the area of triangle abc if a = 8, b = 11, and c = 15?