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I am Lyosha [343]
3 years ago
10

A first number plus twice a second number is 9. Twice the first number plus the second totals 27. Find the numbers

Mathematics
1 answer:
SOVA2 [1]3 years ago
6 0
Create a a system of 2 equations: 2x + y = 27 and 2y + x = 9, with x being the first number and y being the second. solve for the two variables and you'll get the first number is 15 and the second is -3.
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3 years ago
What is –9. 2(8x – 4) 0. 7(2 6. 3x) simplified? –69. 19x – 32. 39 –69. 19x 38. 2 –72. 2x 41. 21 75x – 338. 2.
trasher [3.6K]

The simplified form of the equation is \rm -69.19x+38.2.

<h2>Given that</h2>

Equation; \rm -9.2(8x - 4) + 0.7(2 + 6.3x)

<h3>We have to determine</h3>

The simplified form of the equation;

<h3>According to the question</h3>

To determine the simplified form of the equation following all the steps given below.

Equation; \rm -9.2(8x - 4) + 0.7(2 + 6.3x)

<h3>To simplify the equation multiple the terms and solve.</h3>

Then,

The simplified form of the equation is,

\rm =-9.2(8x - 4) + 0.7(2 + 6.3x)\\&#10;\\&#10;= (-9.2) (8x)- (-9.2)(4) + (0.7)(2) + (0.7) (6.3x)\\&#10;\\&#10;=-73.6x -(-36.8) +(1.4)+(4.41x)\\&#10;\\&#10;= -73.6x+36.8+1.4+4.41x\\&#10;\\&#10;=-69.19x+38.2

Hence, The simplified form of the equation is \rm -69.19x+38.2.

To know more about Equation click the link given below.

brainly.com/question/26252222

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2 years ago
The elements that compose seawater, along with the corresponding percents, are shownin the table.Mrs. Buller collects a 500-ml s
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Answer: Mrs.Buller collects a 500-ml sample of seawater for her chemistry class, and it has 1.94% of chlorine, we have to determine the amount of chlorine in the sample:

\begin{gathered} C=\frac{1.94}{100}\times500=9.7ml \\ C=9.7ml \end{gathered}

Therefore the chlorine content in 500ml of water is 9.7ml.

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1 year ago
What are the answers of these and if work is needed please explain? Thank you
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3) (-2,0] point where the graph is going down
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