what is the sum of the first 25 terms of an arithematic sequence if the sum of its 8th and 18th terms is 72?​

If given an equation of a line such as -1/2x+6 how would you create an equation of a line parallel and perpendicula to this line that goes through another point such as (4,10)

Find the solution of this system of equations -7x+y=-20 9x-3y=36

Afile that is 274 megabytes is being downloaded. if the download is 12.8% complete, how many megabytes have been downloaded? round your answer to the nearest tenth.