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Aleksandr-060686 [28]

3 years ago

8

I need help my question is 4/7 divided by -13/5

2 answers:

notka56 [123]3 years ago

7 0

Answer:

-20/91

Step-by-step explanation:

Cloud [144]3 years ago

6 0

I remember how to divide fractions by doing keep, change, flip. “Keep” means keeping the first fraction the same. The “change” means changing the division to multiplication. Lastly the “flip” means switching the numerator and the denominator. So, you would solve 4/7 times -5/13 . Multiply the numerator and denominator. So the answer would be, -20/91

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17x-3y=4 2x-4y=1 the solution to the system of equations is

Burka [1]

ANSWER

$x=\frac{13}{62}$

and

$y= \frac{-9}{62}$ e have

EXPLANATION

$17x-3y=4---(1)$

$2x-4y=1$

Let us make y the subject and call it equation (2)

$2x=1+4y$

$x=\frac{1}{2}+2y--(2)$

We put equation (2) in to equation (1)

$17(\frac{1}{2}+2y)-3y=4$

$\frac{17}{2}+34y-3y=4$

$34y-3y=4- \frac{17}{2}$

Simplify to get,

$31y= \frac{8-17}{2}$

$31y= \frac{-9}{2}$

Divide both sides by 31,

$y= \frac{-9}{2} \div 31$

$y= \frac{-9}{2} \times \frac{1}{31}$

$y= \frac{-9}{62}$

We put this value in to equation (2) to get,

$x=\frac{1}{2}+2\times -\frac{9}{62}$

$x=\frac{1}{2} -\frac{18}{62}$

We collect LCM to obtain,

$x=\frac{31-18}{62}$

$x=\frac{13}{62}$

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Step-by-step explanation:

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