How do you source this problem

Y=x-5
4x +y = 20

Over the last 8 nights, elyse earned the following in tips: {105, 120, 84, 95, 100, 132, 140}. if she earns $140 a night for the next four nights, which measure of center would increase more, the mean or median?

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c

Last week jason walked 3 1/4 miles each day for 3 days and 4 5/8 miles each day for 4 days. about how many miles did jason walk last week?