Ryker is given the graph of the function
y= 1/2x^2 - 4 . he wants to find the zeros of the function but is unable to read them exactly from the graph. find the zeros give answer to nearest tenth

What is the answer to this problem 7 * 5/6

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

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?