Ametal worker has a metal alloy that is 30% copper and another alloy that is 55% copper. how many kilograms of each alloy should the metalworker combine to create 120 kg of a 45% copper alloy?

The metalworker should combine 48 kg of 30% copper alloy and 72 kg of 55% copper alloy to make 120 kg of 45 5 copper alloy

Solution:

Let "x" be the amount of 30% copper alloy used in the mix

Then 120 - x will be the amount of 55% copper alloy used in mix

The total amount of copper in the mix is then,

Thus 48 kg of 30% copper alloy used in the mix

Then (120 - x) = 120 - 48 = 72

Thus 72 kg of 55% copper alloy used in mix

Thus the metalworker should combine 48 kg of 30% copper alloy and 72 kg of 55% copper alloy to make 120 kg of 45 5 copper alloy

b

step-by-step explanation:

the total is 23.97. 0.25% is off so you have to subtracting 25% from 100% and you will get 75% if you convert it to decimal you will get 0.75. you have to find the original because the formula is % times original = total.so you have the total and the % so you just have to plug it in.

well what you have to do is divide 84 by 6 so theanswer

step-by-step explanation:

84 divided by 6 = 14

and that lightbulb changing party must be freaking lit!