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20.07.2020 •
Mathematics
George buys some first class and second class stamps to put on some letters. Each first class stamp costs 67p, and each second class stamp costs 58p. The ratio of first to second class stamps is 1:4. George bought 320 stamps. How much did George pay for all the stamps?
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Ответ:
yes it is that one because you are trying to find the area. an area is lx2 + wx2 because you are trying to find how much to cover on the inside of the rectangle. this is a little hard to explain but it is y squared