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unicorns110504
05.10.2019 •
Mathematics
Cecelia bought a teddy baer for $39.95 for her collection. she also bought a small teddy bear for $17.95. how much did she spend altogeteher
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Ответ:
$57.90
Explanation:
39.95+17.95
Ответ:
y = 50-x
0.31x + 0.46y = 0.40·50
0.31x + 0.46(50-x) = 20
0.31x - 0.46x + 0.46·50 = 20
-0.15x = -3
x = 20 pounds of 31¢ flour
y = 50-x = 30 pounds of 46¢ flour