david7962
01.08.2019 •
Mathematics
Abox contains 146 marbles which are either red or blue. there are 28 more blue marbles than red marbles. how many blue marbles are in the box?
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Ответ:
r + (r+28) = 146, or 2r + 28 = 146.
Simplifying: 2r = 118. Then r = 59, and b = r+28 = 59+28 = 87 blue marbles
Ответ:
0
Step-by-step explanation:
Because the board is already a yard long, she does not need to cut it. There is only 1 piece, which she does not need to cut to have to be a yard long.