the ratio of white marbles to black marbles is 7 to 10. if there are 136 marbles in the bag how many marbles are white?

Which of the following represents a number squared is equal to twenty more than nine times that number ? a) x squared = 9x + 20 b) x squared = 20x + 9 c) x squared > 9 + 20x d) x squared = 9 + x + 20

Use set builder notation to represent the following set: { -3, -2, -1, 0}

Ineed to know the answer to this algebra question.