Ijust need the answers you don’t have to explain for number 4

Given a(-12,5) and b(12,29) find the point that divides the line segment ab three-eighths of the way from a to b

Asystem of equations has 1 solution.if 4x-y=5 is one of the equations , which could be the other equation ?

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.