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shepuryov [24]
3 years ago
10

My sis wants a explanation on ratios heres the question

Mathematics
2 answers:
Digiron [165]3 years ago
6 0
The answer is b because if you do 12/20each side divie by 4 it is 3/5
PIT_PIT [208]3 years ago
5 0
5 to 8 is the ratio. It is the exact answer.
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mafiozo [28]
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Answer:

A

Step-by-step explanation:

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So.. hmm check the picture below

now, to know where A and B are, that occurs when the parabolic equation equates the linear one

thus 

\bf y=-2x^2+8x&#10;\\\\\\&#10;x-2.23y+10.34=0\implies \cfrac{x+10.34}{2.23}=y&#10;\\\\\\&#10;y=y\implies -2x^2+8x=\cfrac{x+10.34}{2.23}&#10;\\\\\\&#10;-4.46x^2+17.84x=x+10.34&#10;\\\\\\&#10;0=4.46x^2-16.84x+10.34

now, running that on the quadratic formula, you end up with the values of 3.00402497440839842242  and 0.77175977895483027713

thus B rounded up is 3.004  and A rounded up is 0.7718

what's the "y" value for B?, well, you can use either the linear or quadratic equation for that, let's use the quadratic one

\bf B=3.00402497440839842242&#10;\\\\\\&#10;f(B)=-2B^2+8B\implies f(B)=5.98386770152842978586

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