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3 years ago

Please help I will mark brainly!!

Mathematics

2 answers:

ehidna [41]3 years ago

5 0

To simplify the fraction, convert the decimal to fractional notation, by looking at the place value of the number.

Here 0.5 = 1/2.

And to convert to percentage simply multiply by 100.

Thus it would be 50 percent.

She will earn 50 dollars.

gizmo_the_mogwai [7]3 years ago

5 0

She will earn $50.
Because 0.5 is 1/2 and that is %50 because 1/2 is a half and 50 is half of 100. Hope this helps you. Happy thanksgiving!

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3 years ago

Determine whether the system of linear equations has one and only one solution, infinitely many solutions, or no solution. 2x-y=

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Answer:

The system of linear equations has infinitely many solutions

Step-by-step explanation:

Let's modified the equations and find the answer.

Using the first equation:

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$2*(2x-y)=2*5$ which can by simplified as:

$4x-2y=10$ which is equal to:

$4x=2y+10$

Considering the second equation:

$=4x+ky=2$

Taking into account that from the first equation we know that: $4x=2y+10$ , we can express the second equation as:

$2y+10+ky=2$ , which can be simplified as:

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$y=-8/(2+k)$

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$2+k=0$ if $k=-2$

This means that k can be any number different than -2, and for each of these solutions, there is a different solution for y, allowing also, different solutions for x.

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$y=-8/(2+0)$ which give us y=-4, and, because:

$4x=2y+10$ if y=-4 then $x=(-8+10)/4=0.5$

Now let's try with k=-1, then:

$y=-8/(2-1)$ which give us y=-8, and, because:

$4x=2y+10$ if y=-8 then $x=(-16+10)/4=-1.5$ .

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