To the nearest hundred, what is the greatest whole number that rounds to 2500

Can someone me with this problem i don't understand i need

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

(50 points) drag each description to the correct location on the table. each description can be used more than once. some systems of equations and their graphs are given in the table. for each system, place the description(s) in the box that correctly describe the type of system shown. :