HELP ASAP PLEASEE!! a metal alloy weighing 4 mg and containing 20% iron is melted and mixed with 12 mg of a different alloy whic
h contains 40% iron. which percent of the resulting alloy is iron?
A)12%
B)20%
C)35%
D)55%
1 answer:
Answer:
35 percent
Step-by-step explanation:
To solve this problem we multiply the amount by the percent and add them up to get the total amount times the percent
amount * percent + amount * percent = total amount * percent
4 * .20 + 12 * .40 = (4+12) * x
.8 + 4.8 = 16 x
Combine like terms
5.6 = 16x
Divide by 16
5.6/16 = 16x/16
.35 =x
35 percent
You might be interested in
Rational numbers are Sometimes natural numbers
hope this helps :D
Answer:
Option 2
Step-by-step explanation:
It's a rotation
Answer:
Step-by-step explanation:
-5x - 10y = -30
5x + 3y = 2
-7y = -28
y = 4
x + 8 = 6
x = -2
(-2, 4)
Divide the number of events by the number of possible outcomes