Answer:
5x4=20
20x2=40
Step-by-step explanation:
let the weight of the second alloy be y
convert the percentage to fraction, that is 10/100=0.1, 18/100=0.18, 13/100=0.13
Total weight if the mixture is 0.1 x 25+0.18y=0.13(25+y)
2.5+0.18y=3.25+0.13y
like terms together
0.18y +0.13y = 3.25-2.5
0.05y=0.75
divide both side by 0.05
Y is therefore 15 pound of 18% copper is needed
Answer: 803.84 --> 803.8
Step-by-step explanation:
4^4=16x3.14=50.24*16=803.84
Answer:
6x+24
Step-by-step explanation:
just do distributing