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Tamiku [17]
3 years ago
8

How can I do this exercise?

%202%7D" id="TexFormula1" title="\frac{-2}{12} = \frac{x + 1}{x + 2}" alt="\frac{-2}{12} = \frac{x + 1}{x + 2}" align="absmiddle" class="latex-formula">
Mathematics
1 answer:
matrenka [14]3 years ago
3 0

Answer:

-8/7 =x

Step-by-step explanation:

-2         x+1

----- = -----------

12         x+2

Using cross products

-2 (x+2) = 12 (x+1)

Distribute

-2x -4 = 12x+12

Add 2x to each side

-2x+2x -4 = 12x+2x+12

-4 = 14x +12

Subtract 12 from each side

-4-12 = 14x

-16 = 14x

Divide each side by 14

-16/14 =14x/14

-8/7 =x

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Ugo [173]

Answer:

y=-3.2\\\\y=-2.2\\\\y=-1.8

Step-by-step explanation:

Insert the given x values for the given equation to find the corresponding y coordinate:

y=0.2x-2

x:-6,-1,1

Insert -6:

y=0.2(-6)-2

Simplify multiplication (when multiplying a negative and a positive, the result will always be negative):

y=-1.2-2

Simplify (when subtracting from a negative number, add the values, but keep the negative symbol):

y=-3.2

Insert -1:

y=0.2(-1)-2\\\\y=-0.2-2\\\\y=-2.2

Insert 1:

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3 years ago
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Hitman42 [59]

Answer:

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Step-by-step explanation:

From the given figure, using trigonometry

\frac{BC}{AB}=sin60^{{\circ}}

Substituting the given values, we get

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AB=\frac{18}{\sqrt{3}}

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Thus, The length of the support AB is 9 divided by sin 60 degrees.

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Liono4ka [1.6K]

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Step-by-step explanation:

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