Division. When you divide, the quotient is what you get as the answer
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.
Answer:
I think you have a typo in you choices...
y = -4/3 x is the answer...
which is the same as y = - 1 1/3 x
you don't have that choice, "A" and "C" are the same..
I think that one of them is "y = - 1 1/3 x "
y = kx
-12 = k 9
k = -12/9 = -4/3
Step-by-step explanation:
The answer is 13 over 4 your so it would be 3 1/4