Sal currently has $100 in a savings account and is saving $20 per week, while his brother Bill has $400 in
his account but is spending $10 a week. After how many weeks will they have the same amount of money in
their accounts? How much money will they each have?

1 point to define your variable

3 points for work shown

Let
x =
y =

4 points for writing equations
Sal's Equation:
Bill's Equation:

2 points for correct answer
#of weeks:
Amount of money

Apoll is being conducted at a mall nothingto obtain a sample of the population of an entire country. what is the frame for this type of​ sampling? who would be excluded from the survey and how might this affect the results of the​ survey? what is the frame for this type of​ sampling? a. the frame is people who need new clothes. b. the frame is people who shop at the mall. c. the frame is people who like to shop. d. the frame is the entire population of the country. who would be excluded from the survey and how might this affect the results of the​ survey? a. any person that does not need new clothes is excluded. this could result in sampling bias due to undercoverage. b. any person who does not shop at the mall is excluded. this could result in sampling bias due to undercoverage. c. any person who does not shop at the mall is excluded. this could result in nonresponse bias due to people not participating in the poll. d. there is nobody that is being excluded from the survey.