Answer:
4 liters of 5% and 16 liters of 17.5%
Step-by-step explanation:
Let quantity of 5% be x liters and of 17.5% be y liters
x+y=20 hence y=20-x
Introducing percentages
0.05x+0.175(20-x)=0.15*20
0.05x+3.5-0.175x=3
-0.125x=-0.5
Therefore, y=20-x=20-4=16
You need 4 liters of 5% and 16 liters of 17.5% to achieve 20 liters of 15% acid solution
There are 2 sides to a coin so 2 outcomes so far
then 3 balls to chose from so 3 times as many
so
h=heads
t=tails
r=red
b=blue
g=green
I will put them into slots where column 1 is coins and column 2 is color of ball
1, 2
h, r
h, b
h, g
t, r
t, b
t, g
there are 6 possible outcomes
another way is to multiply all the choices together so 2 coin choices and 3 ball choices so 2 times 3=6
Hey there!
Since we don't have values for b, d, and r, we can't get a specific number for the value of a, if that makes sense. It'll be represented by these variables.
To solve, we need to make sure the equation looks like a = ? .
Subtract b from each side of the equation.
<u>a = dr - b </u>
Now we have solved for a.
Hope this helps!