Anumber is divided in the ratio 7: 4.if the first part is 105,find the number

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?

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

The measure of an angle is 117°. what is the measure of a supplementary angle?