In a class of 40 students of the total number of students like to study English and of the total number of students like to study Mathematics and the remaining like to study Science.(what is the fraction of total number of students that like to study science​

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

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?

Which expressions equal 9 when x=4 and y=1/3 a. x2+6y b. 2x + 3y c. y2-21x d. 5 (x/2) -3y e. 3x-9y