Apharmacy wants to survey its customers to find out which brand of toothpaste they prefer.

which survey methods are likely to be biased?

select each correct answer.

those customers who buy toothpaste with a coupon are selected, and the toothpaste brand they purchased is recorded.

a survey is sent to the customers who are on the pharmacy’s frequent buyer list.

every 10th customer who enters the pharmacy on 1 day is selected and asked.

one hundred people from the pharmacy’s customer list are selected at random, called on the phone, and asked.

Lena reflected this figure across the x-axis. she writes the vertices of the image as a'(−2, 8), b'(−5, 6), c'(−8, 8), d'(−4, 2).

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?

Finally, the arena decides to offer advertising space on the jerseys of the arena’s own amateur volley ball team. the arena wants the probability of being shortlisted to be 0.14. what is this as a percentage and a fraction? what is the probability of not being shortlisted? give your answer as a decimal. those shortlisted are entered into a final game of chance. there are six balls in a bag (2 blue balls, 2 green balls and 2 golden balls). to win, a company needs to take out two golden balls. the first ball is not replaced. what is the probability of any company winning advertising space on their volley ball team jerseys?