Helena is in charge of selling tickets for the upcoming
play at Willowbrook School. Each drama club member
has been asked to sell tickets to friends and family
members, and Helena wants to know approximately how
many tickets have been sold so far.
Homeroom Data of Tickets Sold:
20, 15, 19, 16, 10
Calculate the mean

16.0 and 22.5    2021 edge

Step-by-step explanation:

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2

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step-by-step explanation:

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