Answer:
6 L
Step-by-step explanation:
Given two solutions:
1st solution is 90% saline solution. Let the volume of this solution be litres.
2nd solution is 50% saline solution. Volume of this solution = 4 L
Resultant solution is 74% saline.
To find:
The volume of 1st solution = ?
Solution:
Total volume of the 74% saline mixture = (4+) Litres
We can write equation here, as per the percentage of saline in the mixtures.
90% of L + 50% of 4 L = 74% of (+4)
Therefore, the volume must be <em>6 L</em>.
Answer:
Step-by-step explanation:
Hi there!
First, complete the square:
Simplify:
I hope this helps!
Answer:
9
Step-by-step explanation:
To find the common difference, take the second term and subtract the first term
13-4 =9
Lets check:
Take the third term and subtract the second term
22-13 =9
The common difference is 9
Answer:
- 3 1/4
- 10.6
- 3 1/3
Step-by-step explanation:
- <em>The distance = number to the right - number to the left</em>
1..................................................................
- -2 1/2 - (-5 3/4) = -5/2 + 23/4 = - 10/4 + 23/4 = 13/4 = 3 1/4
2...................................................................
- 8.4 - (-2.2) = 8.4 + 2.2 = 10.6
3...................................................................
- -3 2/3 - (- 7) = -11/3 + 7 = - 11/3 + 21/3 = 10/3 = 3 1/3