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3 years ago

Given: cos(2x)=-1/9 Angle x is in quadrant I. Find: cos(x)

Mathematics

1 answer:

sergey [27]3 years ago

5 0

My opinion about this answer is 7

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Simplify the expression.

Umnica [9.8K]

3(2y - 8) - 2y(5 - y)

= 6y - 24 - 10y + 2y^2

= 2y^2 - 4y - 24 Answer

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3 years ago

How to calculate rational numbers

Anuta_ua [19.1K]

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Hi my lil bunny!

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The simplest method to find a rational number between two rational numbers x and y is to divide their sum by 2.

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Have a great day/night!

❀*May*❀

8 0

2 years ago

X²+8x-84=0 <br><br>Formúla General

Brums [2.3K]

Answer:

$x_{1} =-14\\\\x_{2} =6$

Step-by-step explanation:

$x^{2} +8x-84=0\\\\x=\dfrac{-b \pm \sqrt{b^{2}-4ac } }{2a} \\\\a=1; \: \: b=8; \: \: c=-84\\\\x=\dfrac{-8 \pm \sqrt{8^{2}-4 \cdot 1 \cdot (-84) } }{2 \cdot 1}=\dfrac{-8 \pm \sqrt{400 } }{2}=\dfrac{-8 \pm20}{2} =-4 \pm 10\\\\x_{1} =-14\\\\x_{2} =6$

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3 years ago

What is 8.2951 rounded to the nearest hundredth?

amid [387]

Answer: 8.29 still...

Step-by-step explanation:

When your doing the nearest hundreth, the thousandth has to be close to 10 to make it a diffrent number, if it WAS, then it would be 8.30

6 0

3 years ago

Read 2 more answers

PLEASEEEE HELP!!!!! I WILL MAKE BRAINLEST!!!!!!!!!!!!<br> What's the common difference of 1,3,5,8

Llana [10]

Answer:

There is no common difference

Step-by-step explanation:

7 0

2 years ago