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3 years ago

4x-5y=20 find the slope

Mathematics

2 answers:

Irina18 [472]3 years ago

5 0

$4x-5y=20 \\
-5y=-4x+20\\
y=\frac{4}{5}x-4$

It's $\frac{4}{5}$

zepelin [54]3 years ago

3 0

<u /> $4x-5y=20 \\ 5y=20-4x \\ y=(4x-20)/5 \\ y= \frac{4}{5} x-4 \\ \\ 

The answer is 4/5.$

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15mm 12mm a= what is the length

Mrrafil [7]

Answer: The area is 180 square millimeters.

The length is 15 mm and the width is 12 mm. The length if the perimeter-- if you were going to ask that is

(2)(15) + 2(12)

54mm.

Step-by-step explanation:

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3 years ago

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Principal Lopez asked her 500 students to vote on the school's annual gift. 300 students voted to donate a telescope for the sci

Maksim231197 [3]

Using the percentage concept, it is found that 60% of the students voted to donate a telescope.

<h3>What is a percentage?</h3>

The percentage of an amount a over a total amount b is given by a multiplied by 100% and divided by b, that is:

$P = \frac{a}{b} \times 100\%$

In this problem:

The total amount is the number of students, which is of b = 500.

300 voted to donate, hence a = 300.

The <em>percentage </em>is given by:

$P = \frac{300}{500} \times 100\% = 60\%$

60% of the students voted to donate a telescope.

More can be learned about the percentage concept at brainly.com/question/10491646

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2 years ago

Amiraneli [1.4K]

Answer:

Step-by-step explanation:

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3 years ago

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Sin^2x + sin^2x + cos²x

Nezavi [6.7K]

Answer:

Answer:

A. 2 sinx cosx - 1 + 2 sin^2 x.

Step-by-step explanation:

sin2x = 2 sinx cosx

cos2x = cos^2x - sin^2x

So sin2x - cos2x = 2 sinx cosx - ( cos^2x - sin^2x)

But cos^2 x = 1 - sin^2 x, so we have:

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3 years ago

If √2 = 1.414 then the value of 5+√2 / 5-√2 is

Gala2k [10]

Answer:

1.787

Step-by-step explanation:

$\\ \sf \frac{5 + \sqrt{2} }{5 - \sqrt{2} } \times \frac{5 + \sqrt{2} }{5 + \sqrt{2} }$

$\\ \sf = \frac{(5 + \sqrt{2}) }{5 - \sqrt{2} } \times \frac{(5 + \sqrt{2}) }{5 + \sqrt{2} }$

$\\ \sf = \frac{25 + 5 \sqrt{2 } + 5 \sqrt{2} + 2 }{( {5})^{2} - ( \sqrt{ {2}})^{2} }$

$\\ \sf = \frac{27 + 10 \sqrt{2} }{25 - 2}$

$\\ \sf = \frac{27 - 10 \sqrt{2} }{23}$

Now putting the value of√2

$\\ \sf = \frac{27 + 10 \times 1.414}{23}$

$\\ \sf = \frac{27 + 14.14}{23}$

$\\ \sf = \frac{41.14}{23}$

$\\ \sf = 1.787$

3 0

3 years ago