Ametalworker has a metal alloy that is 20% copper and another alloy that is 70% copper. how many kilograms of each alloy should the metalworker combine to create 60 kg of a 50% copper alloy? the metal worker should use (blank) kilograms of the metal alloy that is 20% copper and (blank) kilograms of the metal alloy that is 70% copper.

X+Y=60kg

X=60-Y

X*0.2+Y*0.7=60*0.5

(60-Y)*0.2+Y*0.7=30

12-0.2*Y+0.7*Y=30

0.5*Y=18

Y=36 kg

X=60-36

X=24 kg

The metal worker should use 24 kilograms of the metal alloy that is 20% copper and 36 kilograms of the metal alloy that is 70% copper.

use an equation of ratios to determine the amount of gas needed to fill the tank.

    0.2             0.8

  =    

288.75             x

                                                              231 gal

so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.

                                                                0.2

it would take 1155 gal. to fill the tank.

the cost would be

1155 gal         $3

* = $3465   (answer)

      1           1 gal

hope this you

i dont know men

step-by-step explanation: