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3 years ago

Help meh pls

Mathematics

2 answers:

yKpoI14uk [10]3 years ago

8 0

Answer:

Option A is correct.

$1+ \frac{2}{5}x$

Step-by-step explanation:

Simplify: $2 + \frac{3}{5}x - 1 - \frac{1}{5}x$

Like terms are those terms which have same variables to the same power.

Combine like terms;

$(2-1) + (\frac{3}{5}x -\frac{1}{5}x)$

$1+ (\frac{3-1}{5}x)$

Simplify:

$1+ \frac{2}{5}x$

Therefore, the simplified expression of $2 + \frac{3}{5}x - 1 - \frac{1}{5}x$ is, $1+ \frac{2}{5}x$

Iteru [2.4K]3 years ago

4 0

Its 1+20x because you would subtract 2-1-=1 and 35x-15x=20x im sorry this is the real correct answer

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If DA = 6 and MD = 4, what is the length of DK?

Leto [7]

Answer:

DK = 9

Step-by-step explanation:

In triangle AMD,

h² = p² + b²

or, h² = 6² + 4²

or, h²= 36 + 16

so, h² = 52

so, AM² = 52

Take x as reference angle,

cos²x = 16/52

Now,

In triangle, AMK,

Taking x as reference angle,

cos²x = b²/h²

cos²x = AM²/MK²

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cos²x = 16/52 = 52/MK²

or,

16/52 = 52/MK²

or, 16MK² = 2704

or, MK² = 2704/16

or, MK² = 169

so, MK = 13

Now,

DK = MK - MD

or, DK = 13 - 4

so, DK = 9

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