lostIn98Math lostIn98Math

16-11-2016
Mathematics

contestada

how much 78 octane gas and 91 octane gas should be blended to make 13 gallons of 85 octane gas

Respuesta :

16-11-2016

13 x 85 = 1105
78 + 91 = 169

169 / 1105 = 6.5

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FallOutBlink FallOutBlink

16-11-2016

Simultaneous equations
x+y=13
78x+91y=85(13)
(x,y)=(6,7)

Answer Link

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