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4 years ago

Plz help im giving out 20 points plz plz dont get it wrong. i will report it u get it wrong

Mathematics

2 answers:

inessss [21]4 years ago

8 0

Answer:

Step-by-step explanation:

zlopas [31]4 years ago

6 0

Answer:

Its A

Step-by-step explanation

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Distribute -x(-10x+9)

nasty-shy [4]

Answer:

$- 10x {}^{2} + 9x$

Step-by-step explanation:

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4 years ago

Which of these strategies would eliminate a variable in the system of equations? { − x + 6 y = 8 7 x − y = − 2 ⎩ ⎪ ⎪ ⎨ ⎪ ⎪ ⎧ −

PilotLPTM [1.2K]

Answer:

The required solution is $x=\frac{98}{41}$ and $y =\frac{8}{123}$ .

Step-by-step explanation:

Given equations are

-x+6y = -2.......(1)

$\frac87x-y=-2$ .......(2)

First we have to equate the coefficient of y or x. Here we equate the coefficient of y . So equation (2) multiply by 6.

Then the equation (2) becomes

$\frac{8\times 6}{7}x-6y=-2\times6$

$\Rightarrow \frac{48}{7}x-6y=-12$ ........(3)

Since the signs of y are is opposite, so we adding (1) and (2).

$(-x+6y)+ \frac{48}{7}x-6y=-2-12$

$\Rightarrow -x+\frac{48}{7}x=-14$

$\Rightarrow \frac{-7x+48x}{7}=-14$

$\Rightarrow \frac{41x}{7}=-14$

$\Rightarrow x=\frac{-14\times 7}{41}$

$\Rightarrow x=\frac{98}{41}$

Putting the value of equation (1)

$-\frac{98}{41}+6y=-2$

$\Rightarrow 6y =-2+\frac{98}{41}$

$\Rightarrow 6y =\frac{-82+98}{41}$

$\Rightarrow y =\frac{16}{41\times 6}$

$\Rightarrow y =\frac{8}{123}$

The required solution is $x=\frac{98}{41}$ and $y =\frac{8}{123}$

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3 years ago

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Wittaler [7]

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Step-by-step explanation:

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25/100 reduces to 1/4

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3 years ago

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adelina 88 [10]

Answer:

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Step-by-step explanation:

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3 years ago

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4 years ago