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prisoha [69]
3 years ago
10

A chemist has 0.2 liters of an acid solution whose acid concentration is 65%. How many liters of pure water should be added to l

ower the concentration to 50%?
Mathematics
1 answer:
lorasvet [3.4K]3 years ago
4 0

Answer:

0.06

Step-by-step explanation:

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One bag contains 3/5 kg of corn. A farmer feeds his chickens 4 bags of corn each week. How many kilograms of corn do they eat ea
Svet_ta [14]
1day=\frac{1}{7}week\\\\4\ bags\ for\ 1\ week\\
x\ bags\ for\ \frac{1}{7}\ week\\\\
cross\ multipliction:\\
4*\frac{1}{7}=x\\
x=\frac{4}{7}\\\\
In\ one\ bag\ there\ is\ \frac{3}{5}kg\ of\ corn\\
In\ \frac{4}{7}\ of\ bag\ there\ is:\\
\frac{4}{7}*\frac{3}{5}kg=\frac{12}{35}kg\\\\
He \ need\ \frac{12}{35}kg\ of\ corn\ each\ day.

3 0
3 years ago
Which substance is a heterogeneous mixture?<br> Cereal<br> Silver<br> Nickel<br> Shampoo
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It's definitely cereal because you can see the different contents, making it heterogeneous. The rest of the options, whether mixtures or natural elements, are homogeneous because all the contents come together nicely. 
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3 years ago
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madreJ [45]

Answer:

72/18=4

Step-by-step explanation:

3 0
3 years ago
Write the equation for the line of best fit
Vsevolod [243]

<u>Given</u>:

The given graph shows the scatter points.

We need to determine the equation for the line of best fit.

<u>Slope of the equation:</u>

From the figure, it is obvious that the slope of the line is m=2.33

Rounding off to the nearest tenth, we get;

m=2.3

Thus, the slope of the equation is m=2.3

<u>Value of y - intercept:</u>

From the figure, it is obvious that the y - intercept is b=33.153

Rounding off to the nearest tenth, we get;

b=33.2

Thus, the y - intercept of the equation is b=33.2

<u>Equation of the line:</u>

The equation of the line can be determined using the formula,

y=mx+b

Substituting m=2.3 and b=33.2, we get;

y=2.3x+33.2

Thus, the equation for the line of best fit is y=2.3x+33.2

8 0
4 years ago
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Which of the following tables represents a function?
Contact [7]

Answer:

x 2-2 3-3

y 5 5  7 7

Step-by-step explanation:

Each domain, or x value, can only be matched with one y value, so given this, the third one is the answer since every domain is only matched with one range, or in other words, there are no repeating domains in on the x row of the table.

5 0
3 years ago
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