X = amount of 50% solution
y = total amount after mixing
Note that the amount of alcohol in the 20% solution is 80 (0.2) = 16 oz.
We have 2 unknowns, so we need 2 equations:
first, we can write the equation for the total volume:
y = x + 80
next, apply the percentages to get an equation for the amount of alcohol:
0.4 y = 0.5 x + 16
Finally, solve the pair of equations (in this case, by substitution of the 1st into the second:
0.4 (x + 80) = 0.5x + 16
0.4 x + 32 = 0.5X + 16
rearrange and combine like terms:
0.1x = 16
x = 160
from the 1st equation:
y = 160 + 80 = 240
True, all of them represent a negative number, for example:
You have $60 and you spent $10, the remaining money is:
Your savings are $1000 and you make a Withdrawal of $500:
In other words for calculation purposes, they all have negative values
Answer:
what is this
Step-by-step explanation:
Answer:
there is a 1 to 15 relationship between miles and gallons
Step-by-step explanation:
Hope this helps. Please make me brainliest.
