Solve the given problems

Quadrilateral

Solve each equation using the quadratic formula. find the exact solutions. 6n^2 + 4n - 11

Jon’s weight loss for each week of the month is 5 lbs., 2.5 lbs., and 2.5 lbs. he gained 3.5 lbs. the last week. if jon originally weighed 198 lbs., how much does he weigh now?

If cos(θ)=2853 with θin q iv, what is sin(θ)?