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3 years ago

Hihi please solve ( will mark brainliest ❥ )

Mathematics

1 answer:

Maksim231197 [3]3 years ago

5 0

Answer:

use calculator and then solve it╮(─▽─)╭

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Answer = 60mpm

Speed = Distance/Time

Speed = 300/5

Speed = 60

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3 years ago

2cos^2A-cos2A-1=0 <br> Help

kondor19780726 [428]

Answer:

steps below

Step-by-step explanation:

Are you going to solve the value of A or just a proof the equation

cos 2A = cos² A - sin² A

2cos²A-cos2A-1 = 2cos²A - (cos² A - sin² A) - 1 = cos² A + sin² A - 1

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3 years ago

Please help!

Nitella [24]

$x = r cos \theta \\ \\ y = r sin \theta$

$x = (-2) cos (\pi/3) = (-2)(\frac{1}{2}) =-1 \\ \\ y=(-2) sin (\pi/3) = (-2)(\frac{\sqrt{3}}{2})=-\sqrt{3}$

The rectangular coordinates are:
$(-1,-\sqrt{3})$

4 0

4 years ago

Can you help me please?

morpeh [17]

$\bf 3\sqrt{2}-\sqrt{50}+3-\sqrt{8}+\sqrt{288}-\sqrt{9}~~ \begin{cases} 50=2\cdot 5\cdot 5\\ \qquad 2\cdot 5^2\\ 8=2\cdot 2\cdot 2\\ \qquad 2^2\cdot 2\\ 288=2\cdot 2\cdot 2\cdot 2\cdot 2\cdot 3\cdot 3\\ \qquad 2^4\cdot 2\cdot 3^2\\ \qquad 2 (2^2)^2 3^2\\ \qquad 2(2^2 3)^2\\ \qquad 2(12)^2\\ 9=3^2 \end{cases}$

$\bf 3\sqrt{2}-\sqrt{2\cdot 5^2}+3-\sqrt{2^2\cdot 2}+\sqrt{2\cdot 12^2}-\sqrt{3^2} \\\\\\ 3\sqrt{2}-5\sqrt{2}+3-2\sqrt{2}+12\sqrt{2}-3 \\\\\\ 3\sqrt{2}-5\sqrt{2}-2\sqrt{2}+12\sqrt{2}+3-3\implies \stackrel{\textit{adding like-terms}}{8\sqrt{2}}$

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3 years ago

What is the perimeter of this polygon?

vaieri [72.5K]

The answer to this question is D

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4 years ago