Least common multiple of 8 40 and 64??

Solve by any method (graphing, substitution or linear combination)y = x - 82x + 3y = 1a) (2, -6)b) (5, -3)c) (4, -4)d) (0, -8)i figured it out. the answer is (5, -3)

Find the rate at which the water is now flowing from the tap give your answer cubic centimetres per second

Which of the following is an irrational number