In a school gym, the ratio of the number of boys to the of girls was 4; 3. after 160 boys left the gym the ratio became 4; 5. how many girls were there in the gym?

Solve with work both bert and ernie received an increase in their weekly salaries. bert's salary increased from $520 to $520. ernie's salary went from $580 to $645. find the percent of increase for each salary. what was the larger of the two percents ?

Finding tbe values of the variables in each kite

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.