HELP! THIS IS THE LAST QUESTION OF THE TEST TODAYY :DD

What will the graph look like for a system of equations that has no solution? a. the lines will be perpendicular. b. the lines will cross at one point. c. both equations will form the same line. d. the lines will be parallel.

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

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.