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kvasek [131]
3 years ago
11

Valor de la incognita 9x+4 =5x+12?

Mathematics
2 answers:
Art [367]3 years ago
7 0

Hi,

9x + 4 = 5x + 12

9x + 4 - 4 = 5x + 12 - 4

9x = 5x + 8

9x - 5x = 5x - 5x + 8

4x = 8

4x/4 = 8/4

x = 2

✅ (◠‿◕)

Artemon [7]3 years ago
3 0

Answer:

9x+4=5x+12

9x-5x=12-4

4x=8

x=2

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A ladder reaches the top of a 20 foot building. the ladder is 4.5 feet away from the building. how long is the ladder?
KATRIN_1 [288]

Answer:

C

Step-by-step explanation:

do that with pithagoras:

20² + 4,5² = x²

400 + 20,25 = x²

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x = \sqrt{420,25}

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4 0
3 years ago
Combine the radicals 4V7 +3V28​
Yanka [14]

Answer:

The answer is

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Step-by-step explanation:

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Simplify 3√28 in order to combine the radicals

We have

<h3>3 \sqrt{4 \times 7}  = 3 \times  \sqrt{4}  \times  \sqrt{7}</h3><h3>= 3 \times 2 \times  \sqrt{7}</h3><h3>= 6 \sqrt{7}</h3>

So we now have

<h3>4 \sqrt{7}  + 6 \sqrt{7}</h3>

Using the rules of surds

That's

<h3>x \sqrt{a }  + y \sqrt{a}  = (x + y) \sqrt{a}</h3>

Simplify the expression

We have

<h3>4 \sqrt{7}  + 6 \sqrt{7 }  = (4 + 6) \sqrt{7}</h3>

We have the final answer as

<h3>10 \sqrt{7}</h3>

Hope this helps you

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3 years ago
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