The answer is -6 you substitute the x for -4 and multiply 3•-4=-12 +6 =-6
You will need 252 mL of pure water to obtain 0.25 mL of the desired 25% solution.
If we add X amount of water to the solution, the total amount of solution is 375+X.
And that must be 25%.
<h3>
What is the amount of solute in the current solution?</h3>
The amount of solute in the current amount of solution is
0.6(375)=225.
That amount won't change by adding water.
So we set up the equation so that the amount of solute divided by the new total amount of solution equals 25%.
225/(375+X)=0.25
cross multiply and solve
225/0.25=(375+X)
900-375=X
X=525
The pure water will you need to add to obtain the desired solution is 525.
Then we check 225/(375+525)=0.25.
To learn more about the mixture problem visit:
brainly.com/question/24647756
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Work = Force * distance (along the line of force)
= 20N*10m
=200 N-m
=200 joules
Answer:
2/7 divided 7= 2/14=1/7
Step-by-step explanation:
In these kind of problems you keep,change,flip
2/7 stays the same the division symbol change to a multiplaction sign and since the 7 is a whole we have to change it to 7/1 and flip it so the answer is 2/14 and since 2 goes into 14 we can simply when change to 1/7
HHope this helps :)
