Bertrand collects movie posters. the number of movie poster in his collection each month as he buys and sells posters. the table shows how many poster he bought or sold in the given month.

january february march april

sold 20 bought 12 brought 22 sold 28

a) which month have changes that can be represented by positive number? which month have changes that can be represented by negative number?

for 'ω'

January        February          March           April

sold 20     bought 12         bought 22       sold 28

A: February and March have changes that can be represented by positive number as items are bought here.

January and April have changes that can be represented by negative number as items are sold here.

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step-by-step explanation:

2/5+1/2=9/10

6/1-9/10=5 1/10

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step-by-step explanation:

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