Product 90 their difference is 13

Find the value of the variable and the length of each secant segment

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?

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class