1 1/3 x 2 1/5 last question for the test!!

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

If on=8x-8,lm=7x+4,nm=x-5,and ol=3y-6

Ken earned $128 from his part-time job this summer. he spent 25% of his money on games. he is going to donate 1/6 of the remaining money to charity. how much money will the charity receive?