Three thousand one hundred nineteen in standard form

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

Anew shopping mall is gaining in popularity. every day since it opened, the number of shoppers is 5% more than the number of shoppers the day before. the total number of shoppers over the first 10 days is 1258 how many shoppers were on the first day?

The square root of 9x plus 7 plus the square rot of 2x equall to 7