Answer: x^2 + 3x - 4
Explanation: I used desmos to double check! This should be right :)
Answer:
What grade are you in. and let me see the choices
Step-by-step explanation:
A is the concentration of the first container, B the second container.
300a+600b=900·(15)=13500
1.3a+6b=135
100a+500b=600·(12.5)=7500
2.a+5b=75
Multiply eq. 2 by (-3) and add to eq. 1 to eliminate A.
3a+6b-3a-15b=135-225
-9b=-90
b=10
Then from eq. 2,
a+50=75
a=25
The first container is a 25% solution and the second container is a 10% solution
Answer:

You have to multiply the whole equation by cubed, since the parenthesis applies for the entire equation.