PLEASE HELP ASAP PLEASE

Jk free points :D

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are:

An airplane travels at an unknown elevation before it descends 3 miles to an elevation of 15 miles. find the elevation of the plane before its descen.

Ana earns 2.5% simple interest on $2,000 in her savings account. she does not make any deposits or withdrawals. after 3 years, how much interest will ana have earned on her savings account?