3 years ago

Solve the following system of equations:

Mathematics

1 answer:

Vinil7 [7]3 years ago

8 0

The answer is (12, -1)
Work in pic:

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Answer:

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Step-by-step explanation:

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3 years ago

A cell phone manufacturer chose 200 people at random and asked them whether they would purchase the newest model for $300. The m

Lina20 [59]

<span>Yes, because the results from Survey 4 differ the most from the other surveys’ results.</span>

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3 years ago

What is the differentiation of 2cos2x

garri49 [273]

2cos2x=y

dy/dx(2cos2x)=-4sin2x

d/du cosu= u'×cos'u=-u'×sinu

d/du sinu= u'×sin'u= u'×cosu

d/du tanu = u'×(1+tan²u)

d/du cotu = u'×-(1+cot²u)

proof for cosu :

cos2x= 1-2sin²x

or 2cosx²-1

or cos²x-sin²x

we will one of this fro example let's take the first one

d/dx 1-2sin²x=0-2×2(sinx)×cosx=-2sin2x

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3 years ago

-(2.6m +5)<br> Please help me

Zinaida [17]

Answer:

Step-by-step explanation:

-(2.6m + 5) = -1(2.6m + 5) = -1•2.6m +(-1)•5 = -2.6m - 5

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3 years ago

The length of the hypotenuse of the right triangle is 25 cm, the length of one of the legs is 10 cm. What is the length of the s

Anna007 [38]

Answer:

21 cm

Step-by-step explanation:

Call the triangle ABC, with the right angle at B, the hypotenuse AC=25, and the given leg AB=10. The altitude to the hypotenuse can be BD. Since the "other leg" is BC, we believe the question is asking for the length of DC.

The right triangles formed by the altitude are all similar to the original. That means ...

AD/AB = AB/AC . . . . . . ratio of short side to hypotenuse is a constant

Multiplying by AB and substituting the given numbers, we get ...

AD = AB²/AC = 10²/25

AD = 4

Then the segment DC is ...

DC = AC -AD = 25 -4

DC = 21 . . . . . centimeters

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3 years ago