Which best describes the end behavior of y = 7x^2?

How do you summarize data in a two-way frequency table?

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much