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3 years ago

-6x + 8 =26 please show work

Mathematics

2 answers:

Lynna [10]3 years ago

5 0

-6x + 8= 26
Subtract 8 on both sides
-6x= 18
Divide -6 to get x by it’s self
x=-3

Alexxandr [17]3 years ago

4 0

U could go to desmos it’s really good

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The length of a rectangle is x-2. It's area is 2x-4. What is a simplified expression for the width?

NNADVOKAT [17]

Answer:

3x-6

Step-by-step explanation:

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At the baseball stadium there are 548 seats that are divided into 14 rows how many seats are in each row

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Answer:

There are 39 seats I think.

Step-by-step explanation:

548 divided by 14 is a decimal but rounded it to the nearest full number.

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What is the surface area of the figure shown? Plz answer asap

Luba_88 [7]

Answer:

$264\ cm^{2}$

Step-by-step explanation:

we know that

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step 1

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step 2

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step 3

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2 years ago

The mean of 5 numbers is 12. If four of the numbers are 1, 2, 3, 20, what is the last number?

liubo4ka [24]

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2 years ago

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Now there is a door whose height is more than its width by 6 chi 8 cun. The distance between the [opposite] corners is 1 zhang.

Kaylis [27]

Answer:

height: 9 chi 6 cun
width: 2 chi 8 cun

Step-by-step explanation:

The factor-of-ten relationship between the different units means we can combine the numbers in decimal fashion. If 1 unit is 1 zhang, then 1 chi is 0.1 zhang and 1 cun is 0.01 zhang. Hence 6 chi 8 cun is 0.68 zhang.

Let x and y represent the width and height, respectively. In terms of zhang, we have ...

y - x = 0.68

x^2 +y^2 = 1^2

Substituting y = 0.68 +x into the second equation gives ...

x^2 + (x +0.68)^2 = 1

2x^2 +1.36x - 0.5376 = 0 . . . . . eliminate parentheses, subtract 1

Using the quadratic formula, we have ...

x = (-1.36 ±√(1.36^2 -4(2)(-0.5376)))/(2·2) = (-1.36 ±√6.1504)/4

x = 0.28 . . . . . the negative root is of no interest

y = 0.28 +0.68 = 0.96

In units of chi and cun, the dimensions are ...

height: 9 chi 6 cun

width: 2 chi 8 cun

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3 years ago

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