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 :

Xaried
Xaried Xaried
  • 16-11-2016
13 x 85 = 1105
78 + 91 = 169

169 / 1105 = 6.5
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FallOutBlink
FallOutBlink FallOutBlink
  • 16-11-2016
Simultaneous equations
x+y=13
78x+91y=85(13)
(x,y)=(6,7)
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