Answer:
30 ml of 45% salt solution and 20 ml of 30% salt solution.
Step-by-step explanation:
Let x be the amount of 45% salt solution and y be the amount of 30% salt solution
the two equation will be:
x+y=60 -- A
0.45x+0.3y=0.4(60) -- B
Solve by substitution
Rewrite Equation A
x+y=60
x=60-y --- C
Substitute C into B
0.45(60-y)+0.3y=24
27-0.45y+0.3y=24
-0.15y=-3
y=20
<u>Substitute</u> the y=20 into equation C
x=60-20
x=30
Therefore, there was 30 ml of 45% salt solution and 20 ml of 30% salt solution.
2006 x 5.75 = 11534.5 .....
Answer: concentration = 15.58%
Step-by-step explanation:
Given: mass of sugar = 24 g = 24 ml [ ∵ 1 g = 1 ml]
Volume of solution = Quantity of water + quantity of solute
= 130 +24 ml
= 154 ml
Concentration = ![\dfrac{mass\ of\ solute}{Volume\ of\ solution}\times100](https://tex.z-dn.net/?f=%5Cdfrac%7Bmass%5C%20of%5C%20solute%7D%7BVolume%5C%20of%5C%20solution%7D%5Ctimes100)
![=\dfrac{24}{154}\times 100\\\\\approx15.58\%](https://tex.z-dn.net/?f=%3D%5Cdfrac%7B24%7D%7B154%7D%5Ctimes%20100%5C%5C%5C%5C%5Capprox15.58%5C%25)
Hence, the concentration =15.58%
To find the length of the playground, you multiply length(width) = area
To reverse this, you have to divide on each side by the term we know (x + 3)
The answer would be width = (x³ - 7x + 6) / (x + 3)
If you need help solving this, let me know
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Hope this helps, have a great day!