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Vera_Pavlovna [14]
3 years ago
12

-x-2>2(3-x) solve the inequality

Mathematics
1 answer:
morpeh [17]3 years ago
3 0

Solution, -x-2>2\left(3-x\right)\quad :\quad \begin{bmatrix}\mathrm{Solution:}\:&\:x>8\:\\ \:\mathrm{Interval\:Notation:}&\:\left(8,\:\infty \:\right)\end{bmatrix}

Steps:

\mathrm{Expand\:}2\left(3-x\right):\quad 6-2x, -x-2>6-2x

\mathrm{Add\:}2\mathrm{\:to\:both\:sides}, -x-2+2>6-2x+2

\mathrm{Simplify}, -x>-2x+8

\mathrm{Add\:}2x\mathrm{\:to\:both\:sides},-x+2x>-2x+8+2x

\mathrm{Simplify}, x>8

The correct answer is <u><em>x>8</em></u>

Hope This Helps!!!

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3 years ago
Find the 13th term of the arithmetic sequence -3x – 1,42 + 4,112 + 9, ...
Strike441 [17]

Answer:

The 13th term is 81<em>x</em> + 59.

Step-by-step explanation:

We are given the arithmetic sequence:

\displaystle -3x -1, \, 4x +4, \, 11x  + 9 \dots

And we want to find the 13th term.

Recall that for an arithmetic sequence, each subsequent term only differ by a common difference <em>d</em>. In other words:

\displaystyle \underbrace{-3x - 1}_{x_1} + d = \underbrace{4x + 4} _ {x_2}

Find the common difference by subtracting the first term from the second:

d = (4x+4) - (-3x - 1)

Distribute:

d = (4x + 4) + (3x + 1)

Combine like terms. Hence:

d = 7x + 5

The common difference is (7<em>x</em> + 5).

To find the 13th term, we can write a direct formula. The direct formula for an arithmetic sequence has the form:

\displaystyle x_n = a + d(n-1)

Where <em>a</em> is the initial term and <em>d</em> is the common difference.

The initial term is (-3<em>x</em> - 1) and the common difference is (7<em>x</em> + 5). Hence:

\displaystyle x_n = (-3x - 1) + (7x+5)(n-1)

To find the 13th term, let <em>n</em> = 13. Hence:

\displaystyle x_{13} = (-3x - 1) + (7x + 5)((13)-1)

Simplify:

\displaystyle \begin{aligned}x_{13} &= (-3x-1) + (7x+5)(12) \\ &= (-3x - 1) +(84x + 60) \\ &= 81x + 59 \end{aligned}

The 13th term is 81<em>x</em> + 59.

3 0
3 years ago
What s 464657474+64736825483
poizon [28]

Answer:

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3 years ago
Which are equivalent ratios to 7:13?
Dennis_Churaev [7]

Answer:

14:26, 21:39, 28:52, 35:65, 42:78, 41:91

Step-by-step explanation:

All of the above are equivalent ratios. These are only a few. More can be found by just simply multiplying 7 by any amount, and 13 by any amount.

6 0
3 years ago
Find the value of x in the triangle shown below.​
ZanzabumX [31]

Answer:

Step-by-step explanation:

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