What does the y-intercept represent? the amount of water that is added to the barrel each day the amount of water that remains in the water barrel the amount of water that is initially in the water barrel the amount that the water barrel decreases each day

Okay so i didn't get this problem petro bought 8 tickets to a basketball game he paid a total of $200 write an equation to determine whether each ticket cost $26 or $28 so i didn't get this question so yeahyou have a good day.

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

Ascientist has discovered an organism that produces five offspring exactly one hour after its own birth, and then goes on to live for one week without producing any additional offspring. each replicated organism also replicates at the same rate. at hour one, there is one organism. at hour two, there are five more organisms. how many total organisms are there at hour seven? 2,801 19,531 19,607 97.655