2(x - 4) = 7 - 3x pls help plss

Using the quadratic formula find the zeros of the given polynomial -5x^2+3x-11

Josh has a rewards card for a movie theater he receives 15 points for becoming a rewards card holder he earns 3.5 points for each visit to the movie theater he needs at least 55 points to earn a free movie ticket which inequality can josh use to determine x, the minimum number of visits he needs to earn his first free movie ticket.

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?