alice1956alixcetran alice1956alixcetran

13-03-2016
Mathematics

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Ayako spent $7.80 on equal weights of beads of white and red beads. The red beads cost twice as much per punce as the white beads. How much did Ayako spend on each colour of beads?

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Аноним Аноним

13-03-2016

$2.60 on white beads and $5.20 on red beads

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apologiabiology apologiabiology

16-03-2016

ok so
red+white=7.8
r+w=7.8

red=2 times cost of white
r=2w
therefor subsitute 2w for r
2w+w=7.8
3w=7.8
divid both isdes by 3
w=2.6
subsitute
r=2w
r=2(2.6)
r=5.2

$2.60 for white
$5.20 for red

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