Lets call x the amount of 18% solution and y the amount of 40% solution, and write as equations the info of the problem:
18x + 40y = 10(20)
x + y = 10
lets multiply the second equation by -18 and add to the first:
18x + 40y = 200
-18x -<span> 18y = -180
</span>----------------------
0 + 22y = 20
y = 20/22 = 10/11
and substitute in the original equation:
x <span>+ y = 10
</span>x = 10 - y
x = 10 - 10/11
x = 110/11 - 10/11
x = 100/11
so they have to use 100/11 liters of 18% solution and 10/11 liters of 40% solution
Answer:
y = 8 + 4x / 2
Step-by-step explanation:
Answer:
B) 5x^2
Step-by-step explanation:
We can divide 50 by 2, we get 25 and we can cancel out x from x^5.
Therefore, we get
= √25x^4
When we take the square root of 25, we get 5 and √x^4 = x^2.
Taking the square root, we get
= 5x^2
Answer: B) 5x^2
Thank you.
Answer:
Hey buddy,
Step-by-step explanation:
2 multiplied by 3 is equal to 6 And 3 groups of 2 is 6. Instead of adding everytime multiplication is much easier .
