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Alborosie
2 years ago
7

Darius buys a bottle of a chemical solution that contains 70% alcohol. The bottle contains 500 ml of solution. How many millilli

ters of alcohol are in the solution
Mathematics
2 answers:
mars1129 [50]2 years ago
8 0
It is. 7.17285714285714 you can stop at the thousands
NARA [144]2 years ago
8 0
7.14% will be the percent. it is very long
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Solve the system using elimination.<br> 2x + 18y = -9<br> 4x + 18y = -27
Elan Coil [88]

First, let's cancel out the x by multiplying 2x + 18y = -9 by -2.

-2 ( 2x + 18y = -9) = -4x -36y = 18

Then, we combine the two equations.

-4x + 4x = 0

18y - 36y = -18y

-27 + 18 = -9

Our new equation is -18y = -9.

Now, divide both sides by -18.

-18y / -18 = y

-9/ -18 = 1/2

y = 1/2

We can plug in a value for y since y = 1/2 now.

Let's use 2x + 18y = -9

Plug in y.

2x + 18(1/2) = -9

2x + 9 = -9

Then, subtract 9 from both sides.

2x = -18

Divide by 2.

2x/2 = x

-18/2 = -9

x = -9

Lastly, we can plug in both x and y values to see it works.

2(-9) + 18(1/2) = -9

-18 + 9 = -9

Therefore, the values of x and y does work.

x = -9

y = 1/2

4 0
3 years ago
John works two jobs as a security guard he earns $9.75 per hour as a landscaper he earns $14 per hour one week john worked a tot
Yuliya22 [10]

Answer:

He worked 26 hours as a security guard and 4 hours as a landscaper

Step-by-step explanation:

7 0
3 years ago
Which property of equality should be used to cancel the operation performed on the variable in the following equation?
Grace [21]

Answer:

division

Step-by-step explanation:

2x/2=8/2=x=4

x=4

6 0
2 years ago
Use distributive property to write an expression without parentheses using the numbers 7,5,6,3 to equal 75
UNO [17]
How many was to make49 out of ones and tens
5 0
3 years ago
Read 2 more answers
Find the number of possible outcomes Five books need to be placed on a shelf. You randomly arrange the books on the shelf from l
iren [92.7K]

Answer:

120

Step-by-step explanation:

Let's say you put them on the shelf one by one, from left to right.

You can pick 1 of the 5 for the first position.

5

Now you have 4 books left. You pick one out of those 4 for the second position.

5 * 4

There are 3 choices left for the 3rd position.

5 * 4 * 3

2 left for the 4th position.

5 * 4 * 3 * 2

Finally, there is one book left for the 5th position.

5 * 4 * 3 * 2 * 1

Now we multiply:

5 * 4 * 3 * 2 * 1 = 120

7 0
3 years ago
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