At a school event there were 96 girls. the ratio of number of girls to the number of boys was 4: 5.after some time some boys arrived and the ratio became 2: 3 .how many boys arrived?

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?

Laura read 1/8 of a comic book in 2 days. she reads the same number of pages every day. what part of the book does she read in a week

Peter measures the angles in a triangle. he finds that the angles are 95, 10 and 75. is he correct? explain your answer