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bagirrra123 [75]
3 years ago
10

Solve for x. 3x/6 + 2 = 8 x = 3 x = 12 x = 24

Mathematics
1 answer:
Advocard [28]3 years ago
8 0

\frac{3x}{6}  + 2 = 8  \\  \frac{3x}{6}  = 8 - 2 \\  \frac{3x}{6}  = 6 \\ 3x  = 36 \\ x = 36 \div 3 \\ x = 12
So; the answer is: 12
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What is the approximate perimeter of the parallelogram with vertices at 2, 4. 4, 1. -2, -2, and -4, 1
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Answer:

The approximate perimeter of the parallelogram is 20.63 units

<em>(or 21 units if rounded up completely)</em>

Step-by-step explanation:

In principle we know that the Perimeter of a Parallelogram is given by:

\Pi=2(w+l)       Eqn. (1)

<em>where \Pi is the Perimeter, w is the width and l is the length of the parallelogram. We also know that since we have a Parallelogram rectangle it means that the two widths will be of equal size and the two lengths will also be of equal size. </em>

Now lets call each point as:

A(2,4)\\B(4,1)\\C(-2,-2)\\D(-4,1)     Eqn. (2)

then we have a Parallelogram ABCD where AB and CD can be our widths and BD and DA can be the lengths (or vice versa).

Since we know the vertices, we can compute each side of the parallelogram (i.e. AB, BC, CD and DA) using the distance formula that in principle reads:

|d|=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}        Eqn. (3)

Thus using the values from Eqn. (2) and the formula of Eqn. (3) for each side we have:

|AB|=\sqrt{(1-4)^2+(4-2)^2}=\sqrt{13}\\\\|BC|=\sqrt{(-2-1)^2+(-2-4)^2}=3\sqrt{5}\\\\|CD|=\sqrt{(1-(-2))^2+(-4-(-2))^2} =\sqrt{13}\\\\|DA|=\sqrt{(1-4)^2+(-4-2)^2} =3\sqrt{5}

Which proves that since |AB|=|CD| and |BC|=|DA| our calculations are correct and ABCD is in fact a parallelogram. So now we have all sides, and recalling Eqn. (1) and plugging in our values (where we can say  w=|AB|=|CD| and l=|BC|=|DA| we have:

\Pi=2(\sqrt{13}+3\sqrt{5})\\\Pi=20.627 units

<em>which can be rounded up as ≅20.63 units or  ≅21.  </em>

6 0
4 years ago
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Answer:

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Step-by-step explanation:

To simplify the expression, we need to combine like terms

23+6c+8d−7d−6

I like to put like terms next to each other

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5 0
3 years ago
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Answer:

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Step-by-step explanation:

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3 years ago
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azamat
There is 20 students in her class.

Ex.
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Answer:

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