Amixture of gasoline and oil is supposed to contain k ounces of oil for every gallon of gasoline.

which coordinate is represented on the graph?

the easiest way to do these would be to solve the equations. if you can solve the equation than you can solve these problems.

2/3=10/15

1/5=3/15

10+3=13/15

2 13/15 is the answer

open side up . . 1/50 . . 2%

closed side up . . 5/50 . . 10%

landed on side . . 44/50 . . 88%

is there more info provided? there is not enough information given in the problem