My homework asks me to add 24714781267893657862587683478563785 63478567892346 by 34732589725979 and then divide it by 3823789573589739572398 and add 39582375892375897235897 to 34892374893275 and then multiply that by 21478 help???

14 pointslet x be the seats in the small van and y the seats in the large van. how many seats does the large van have? a company uses two vans to transport worker from a free parking lot to the workplace between 7: 00 and 9: 00a.m. one van has 9 more seats than the other. the smaller van makes two trips every morning while the larger one makes only one trip. the two vans can transport 69 people, maximum.how many seats does the larger van have?

Multiplying fractions by whole number 5 x 1/3=?

Ken earned $128 from his part-time job this summer. he spent 25% of his money on games. he is going to donate 1/6 of the remaining money to charity. how much money will the charity receive?