A principal orders t-shirts and wants to check some of them to make sure they were printed properly, he randomly selects 7 of the 10 boxes and checks 20 in one box and 40 in others. What type of sample is this? (It's not random sampling btw)

49xy +34y - 72z. determine the degree of the polynomial

John bought 5 lemons and used 2 of them for a salad how much did he use for. a salad . he used % of the lemons.

Phyllis and chen are saving money to go to a football game. each friend starts with some money and saves a specific amount each week. phyllis made a graph to show the total she has saved at the end of each week. chen wrote an equation to show the total, y, he has saved at the end of each week, x. y = 15x + 15 compare the amount that each friend has when both friends start saving. select the correct answer from the drop-down menu to complete the statement. phyllis starts with $ and chen starts with $