IM TIMED HELP PLS , solve the system of equations using substitution method , y = 2x + 8 , y = 4x - 2

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

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

If my mom gets $13.05 an hour, and she works from 3: 30 to 10: 45 in the morning, how much money does my mom make?