How do you simplify 4x + 2y +2x - 7y +8 - 5x -2

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics

Adeposit of 5500 at 6% for 3 years equals

The graph shows the amount of money noah earned based on the number of lawns he cut. which list shows the dependent quantities in the graph?