Aclass has 6 and 15 girls. what is the ratio of boys and girls?

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

1.two more than the quotient of a number and 6 is equal to 7 use the c for the unknown number translate the sentence into an equation

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels