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charle [14.2K]
3 years ago
13

Helpppp meeeee plssss

Mathematics
1 answer:
Diano4ka-milaya [45]3 years ago
3 0
DONT open file it’s a scam and tracker please don’t open it
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Arlecino [84]
The answer to that is 4.
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Solve the equation <br> (x/x+2) - (4/x-2) = 1
liubo4ka [24]

Answer:

<h2>            \bold{x=-\dfrac23}</h2>

Step-by-step explanation:

\dfrac x{x+2}-\dfrac4{x-2}=1\qquad\qquad\qquad x\ne2\ \wedge\ x\ne-2\\\\\\ \dfrac {x(x-2)}{(x+2)(x-2)}-\dfrac{4(x+2)}{(x-2)(x+2)}=1\\\\\\ \dfrac {x^2-2x-4x-8}{x^2-4}=1\\\\ \\\dfrac {x^2-6x-8}{x^2-4}=1\quad\iff\quad x^2-6x-8=x^2-4\\\\x^2-6x-8=x^2-4\\\\-6x-8=-4\\\\-6x=4\\\\x=-\frac46\\\\x=-\frac23

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2 years ago
How big is 2000 sq.ft in yards?
melamori03 [73]
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3 years ago
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Slove the following system of equations <br> 2x-7y=-7<br> -5x+6y=-17
Sergio [31]

Answer:

x = 7

y = 3

Step-by-step explanation:

We are given two equations

2x - 7y = -7 -----------eqn 1

-5x + 6y= -17 ----------eqn 2

Let's pick eqn 1, to make y the subject of the formula

2x - 7y = -7

2x + 7 = 7y

Divide both sides by 7, to make y the subject of the formula

(2x + 7) / 7 = 7y/7

(2x + 7) / 7 = y

Substitute y into the equation 2

-5x + 6y = -17

-5x + 6(2x + 7)/7 = -17

Open the bracket

-5x + (12x + 42) / 7 = -17

LCM = 7

(-35x + 12x + 42) / 7 = -17

(-23x + 42)/7 = -17

Cross multiply

-23x + 42 = -17 * 7

-23x + 42 = -119

-23x = -119 - 42

-23x = -161

- cancels -

23x = 161

Divide both sides by 23 to get the value of x

23x / 23 = 161/23

x = 161/23

x = 7

Substitute the value of x into eqn 1

2x - 7y = -7

2(7) - 7y = -7

14 - 7y = -7

- 7y = -7 - 14

-7y = -21

Divide both sides by -7 to get the value of y

-7y/ -7 = -21/-7

Well, - cancels -

y = -21/-7

y = 3

The values are

x = 7

y = 3

We can verify our values

Let's take eqn 2 to confirm

-5x + 6y = -17

x = 7

y = 3

= -5(7) + 6(3)

= -35 + 18

= -17

Our values are correct

7 0
3 years ago
A store is giving a $10 dollar coupon to every 7th person who enter the store and $25 dollar coupon to every 18th person to ente
Korvikt [17]
It's The 126th person

6 0
3 years ago
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