A scientist needs 60 liters of a 60% acid solution. He currently has a 40% solution and a 70% solution. How many liters of each does he need to make the needed 60 liters of 60% acid solution?
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Equation:
acid + acid = acid
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0.40x + 0.70(60-x) = 0.60*60
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40x + 70*60 - 70x = 60*60
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-30x = -10*60
x = 20 liters
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Gabe needs 20 liters of the 40% solution.
He also needs 40 liters of the 70% solution.
4 * 500 = $2,000
<span>Then, you must calculate how much he earned by the commission: </span>
<span>$42,000 * 3% </span>
<span>(3% = 3/100) </span>
<span>42,000 * 3/100 = 420 * 3 = $1260 </span>
<span>Finally, you add what he earned form the commission plus the 4 weeks salary: </span>
<span>$2,000 + $1260 = $3,260</span>
The question is asking to choose among the following choices that states the statement which could be the ask of the said question base on the passage above, and I would say that the ask to the said problem is in letter D. the number of boys in the class. I hope you are satisfied with my answer and feel free to ask for more
Answer:
<u>-2</u>
Step-by-step explanation:
Solving :
3(x + 2) = 5(2x + 4)
3x + 6 = 10x + 20
10x - 3x = 6 - 20
7x = -14
x = <u>-2</u>
Answer:
Um what work
Step-by-step explanation:
There is no work here what do we type in
