Step-by-step explanation:
Let the x ml of water be mixed with 237 ml of ammonia whose strength is 100%, in order to create a mixture of 75% strength.
The equation required to solve this will be:
237/(237+x)=75/100
solving for x we get:
237/(237+x)=3/4
237×4=3(237+x)
948=711+3x
3x+711=948
3x=948-711
3x=237
x=237/3
x=79 ml
therefore the amount of water to be added will be 79 ml
Hi student, let me help you out!
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Let's solve this inequality by following these steps:
- Add 6 to both sides.
- Subtract 4x from both sides.
- Solve for x.
Step 1: Add 6 to both sides: .
Upon simplifying this, we obtain .
Step 2. Subtract 4x from both sides: .
Upon simplifying, we obtain .
Step 3. Divide both sides by -7.
Upon carrying this out, we obtain .
Remember this...
Hope this helped you out, ask in comments if any queries arise.
Best Regards!
Answer: 72.8
explanation: a^2+b^2=c^2
18^2+b^2=75^2
18^2=324
75^2=5625
324+b^2=5625
-324 -324
b^2=5301
take the square root of both sides
√b^2=√5301
b=72.807966
so b=72.80
About 27.5 percent so B is the correct answer