Divied 4 by both 180 and 320 because 4 quarters= a dollar
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What is the constant of proportionality in the equation 4y=8x
4y=8x
4/4y=8/4x
y=2x
y/x=2x/x
y/x=2
Constant proportionality =2
1/9 times 2/2=2/18
2/3 times 6/6=12/18
2/18+12/18+5/18=(2+12+5)/18=19/18=1 and 1/8
A is answer
