Which of the following is not an acceptable form of proof? a. proof by contradiction b. two-column proof c. flowchart proof d. proof by conjecture

These question are hard can you me with answers

Ineed someone to me answer my question i have to have this done and knocked out

Solve the problem by making up an equation. a man could arrive on time for an appointment if he drove the car at 40 mph; however, since he left the house 15 minutes late, he drove the car at 50 mph and arrive 3 minutes early for the appointment. how far from his house was his appointment?