-7/3+5/3n=6 how do you solve this please help me

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?

Which expression gives the area of the triangle shown below

Which simplifys to a+ b? a-(1-b)+1 -(1-a)-b+1 (a--1) -1)+1