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sergij07 [2.7K]

3 years ago

7

A laboratory technician needs to make a 40-liter batch of a 40% acid solution. how can the laboratory technician combine a batch

of an acid solution that is pure acid with another that is 20% to get the desired concentration?

1 answer:

Kobotan [32]3 years ago

5 0

You need to do is 40 times 40%

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Jafar will get $12400 more if his salary is increased by 31%. Jafar's salary is 20% less of his colleague Ali's salary. What is

Iteru [2.4K]

Answer:

Ali's salary is $50000.

Step-by-step explanation:

Let Jafar's salary be x.

(31/100)*x = 12400

x = (12400*100)/31

x = 400*100

x = $40000

Let Ali's salary be y.

y-[(20/100)*y] = 40000

y-(y/5) = 40000

(5y-y)/5 = 40000

4y = 200000

y = $50000

7 0

3 years ago

7y-12-3y+9=0 help please

nasty-shy [4]

Simplify. Combine like terms

7y - 3y = 4y

-12 + 9 = -3

----------------------------------------------------------------------------------------------------------------

4y - 3 = 0

Isolate the y. Note the equal sign. What you do to one side, you do to the other side. Do the opposite of PEMDAS.

4y - 3 (+3) = 0 (+3)

4y = 3

4y/4 = 3/4

y = 3/4

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y = 3/4 is your answer

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hope this helps

3 0

3 years ago

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PLEASE HELP! Find the missing part.

viktelen [127]

Answer:

Step-by-step explanation:

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3 years ago

How many 14 inch cubes does it take to fill a box with width 314 inches, length 234 inches, and height 114 inches?

Nesterboy [21]

Answer:

Step-by-step explanation:

First you need to find the area then divide that by 14

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3 years ago

Math, help me please...,,,,,

oee [108]

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3 years ago

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