Answer:
C. 153.84 mL
Step-by-step explanation:
Let's say x is the volume of 75% solution and y is the volume of 10% solution.
Sum of the volumes:
x + y = 500
Sum of the alcohol amounts:
0.75x + 0.10y = 0.30(500)
0.75x + 0.10y = 150
Solve the system of equations using either substitution or elimination. I'll use substitution.
y = 500 - x
0.75x + 0.10 (500 - x) = 150
0.75x + 50 - 0.10x = 150
0.65x = 100
x = 153.84
You need 153.84 mL of 75% solution.
So percent means parts out of 100
so x%=x/100
22 out of 105 have green eyes
22/105
we want to find an equivilent fraction that has 100 in the bottom that is equal so 22/105
22/105=x/100
solve for x
multiply both sides by 100 to clear fraction
2200/105=x
simplify
20.95=x
round up
21
answe ris 21%
The answer to that equation is 3 cents
It would be a vertical stretch by a factor of 3. Letter B
For example: when x= 10 in f(x) y = 3 and in g(x) y = 9