Find the volume of this prism

Which values for a and b will create infinitely many solutions for this system of equations? ax-y=8 2x+y=b

The following frequency table relates the weekly sales of bicycles at a given store over a 42-week period. value01234567frequency367108521(a) in how many weeks were at least 2 bikes sold? (b) in how many weeks were at least 5 bikes sold? (c) in how many weeks were an even number of bikes sold?

Solve the equation - 2(m -30) = -6m a-15 b-13 c-8 d8