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3 years ago

9,10,12,x,20,25; The median is 14.

Mathematics

2 answers:

Fantom [35]3 years ago

5 0

Answer:

<h2>The unknown value is 14.</h2>

Step-by-step explanation:

In statistics, the median is a central measure, which represents the value placed in the middle.

In this case, the middle value is between 12 and x. To find the median, we have to find the mean between those two values

$Median=\frac{12+x}{2}$

But, we know by given that the median is 14, we replace it and solve for $x$

$14=\frac{12+x}{2}\\ 28=12+x\\x=28-12\\x=16$

Therefore, the unknown value is 14.

sveticcg [70]3 years ago

3 0

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Answer:

$(-2,8)$ $(7,5)$ $(1,7)$

Step-by-step explanation:

Given

$x + 3y = 22$

Solving (a): The possible coordinates

We have:

$(x,y) = (-2,8)$

This gives:

$x + 3y = 22 \to -2 + 3 * 8$

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$x + 3y = 22 \to 22$

(-2,8) is a point on the grid

$(x,y) = (7,5)$

This gives:

$x + 3y = 22 \to 7 + 3 * 5$

$x + 3y = 22 \to 7 + 15$

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(7,5) is a point on the grid

$(x,y) = (-5,5)$

This gives:

$x + 3y = 22 \to -5 + 3 * 5$

$x + 3y = 22 \to -5 + 15$

$x + 3y = 22 \to 10$

(-5,5) is a not point on the grid

$(x,y) = (1,3)$

This gives:

$x + 3y = 22 \to 1 + 3 * 3$

$x + 3y = 22 \to 1 + 9$

$x + 3y = 22 \to 10$

(1,3) is a not point on the grid

$(x,y) = (1,7)$

This gives:

$x + 3y = 22 \to 1 + 3 * 7$

$x + 3y = 22 \to 1 + 21$

$x + 3y = 22 \to 22$

(1,7) is a point on the grid

So, we plot the following on the grid

$(-2,8)$ $(7,5)$ $(1,7)$

See attachment

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3 years ago

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Let's simplify them top to bottom.

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Answer:

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VMariaS [17]

Answer:

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3 years ago

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Liono4ka [1.6K]

Answer:

Cost of the box of pencils = x = $4

Cost of the notebook = x+2 = 4+2 = $6

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Step-by-step explanation:

Let the cost of the box of pencils = x

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