Let x be your first alloy
2/5x+7/10(30-x)=1/2(30)
4x+210-7x=150
3x=60
x=20
So, you need 20 lbs of the first alloy, and 10 parts of the second to make 30 lbs of half iron and half silver alloy!
C hope this helps you out
Answer:
60 feet but i think the question is written wrong
Step-by-step explanation:
Answer: 63.75 = 85h
Solving gives 0.75 hours.
Step-by-step explanation:
we now that speed = distance / time
therefore time will be Distance / speed
Given that distance = 63.75miles
Speed= 6=85miles per hour
Time(h) = 63.75miles/ 85.---- equation 1
But from the options given, the equation that can also be used to find number of hours is
63.75 = 85h
such that making h subject of formula still give us
h= 63.75/85 as in equation 1 above
solving gives that Time ( h) = 0.75 hours .
The approximate amount of underdeveloped land in 2013 is A = 15300 X e^-0.07(11).
<h3>How do you determine the future value when there is continuous compounding? </h3>
The formula for calculating future value of an investment when there is continuous compounding is A = P x x N
Where:
- P = population in 2002
- r = rate of decrease = 0.07
- n = number of years = 2013 - 2002 = 11 years
A = 15300 X e^-0.07(11)
To learn more about future value, please check: brainly.com/question/25760893