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Elodia [21]
3 years ago
8

Due in an hour! hour​

Mathematics
2 answers:
VLD [36.1K]3 years ago
5 0

Answer:

Step-by-step explanation:

Hope this helps u !!

Lady_Fox [76]3 years ago
3 0

Answer:

( 1 , 2 )

Step-by-step explanation:

x + 4y = 9

x = 9 - 4y .... ( 1)

2x - 4y = -6 ...( 2)

substitute the 9 - 4y as x in the second equation

<u>2( 9 - 4y )</u> - 4y = -6

distribute 2

18 <u>- 8y - 4y</u> = -6

combine like terms

18 - 12y = -6

Subtract 18 from both sides

<u>18 - 18</u> - 12y = <u>-6 - 18</u>

- 12y = - 24

divide both sides by -12

<u>-12y / -12</u> = <u>-24/-12</u>

y = 2

Now , substitute the 2 as y in the second equation

2x - 4y = -6

2x - 4 ( 2 ) = -6

2x - 8 = -6

add 8 to both sides

2x<u> - 8 + 8</u> =<u> -6 + 8</u>

2x = 2

divide both sides by 2

2x / 2 = 2/2

x = 1.

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3 years ago
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What is the Median for the following set of numbers? ​21 23 76 47 55 135 45 30 17
Leno4ka [110]

Answer:

Median = 45

Step-by-step explanation:

We are given the following data set:

21, 23, 76, 47, 55, 135, 45, 30, 17

Median is the number that divides the data into two equal parts.

Formula:

Median:\\\text{If n is odd, then}\\\\Median = \displaystyle\frac{n+1}{2}th ~term \\\\\text{If n is even, then}\\\\Median = \displaystyle\frac{\frac{n}{2}th~term + (\frac{n}{2}+1)th~term}{2}

Sorted data:

17, 21, 23, 30, 45, 47, 55, 76, 135

Sample size = 9, which is odd

Median =

\dfrac{9+1}{2}^{th}\text{ term} = \dfrac{10}{2}^{th}\text{ term} = 5^{th}\text{ term}\\\\= 45

The median of given set of numbers is 45.

7 0
3 years ago
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