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3 years ago

–3x – 3y > –18. –x < –y

Mathematics

1 answer:

Veseljchak [2.6K]3 years ago

6 0

Answer:

hmmm.... -2y/3

hope i helped. :)

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If sin theta = 2/7 and tan theta>0 what is the value of cos theta

Ronch [10]

Answer:

Step-by-step explanation:

sin(θ) = 2/7

sin²(θ) +cos²(θ) =1

$(\frac{2}{7})^{2} +cos^2(theta)=1 \\\\cos^2(theta)=1-(\frac{4}{49} )=\frac{49}{49}-\frac{4}{49} =\frac{45}{49} \\ \\cos(theta)=+/-\sqrt{\frac{45}{49} } =+/-\frac{3\sqrt{5} }{7}$

$Answer \\ is \frac{3\sqrt{5} }{7}$

Answer is positive because tangent is positive, sin is also positive, and tan=sin/cos.

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3 years ago

A team won 8 games and lost 5 games.<br> What’s the Fraction of the games lost?

iVinArrow [24]

Answer:

5/8 or 0.625 for wins

3/8 for lost

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3 years ago

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What is the domain of this table

Crank

Answer:

the answer is b

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3 years ago

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Can someone help with this please

crimeas [40]

Answer:

$3^2$

Step-by-step explanation:

$\frac{3^8*\:3^4}{3^2*\:3^8}$

Apply Exponent rule: $a^b\cdot \:a^c=a^{b+c}$

$\frac{3^{12}}{3^8* \:3^2}$

$\frac{3^{12}}{3^{10}}$

Apply exponent rule: $\frac{x^a}{x^b}=x^{a-b}$

$3^{12-10}=3^2$

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4 years ago

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A square has a perimeter of 8 cm. What is its area?

serious [3.7K]

A square has four sides which all have the same length.

So if we call the length of each side of the square 'a'

The sum of length of all the sides (the perimeter) will be ,

a + a + a + a = 4a

Now let's equal this to the perimeter to find the length of each side 'a'

$4a\quad =\quad 8\\ \\ a\quad =\quad \frac { 8 }{ 4 } \\ \\ a\quad =\quad 2$

So the length of each side of the square is 2 cm

To find area of a square we multiply the length of its two sides

So,

$a\cdot a$ is the area of the square,

$a\cdot a=\quad 2\cdot 2\quad =\quad 4\\ \\ 4\quad c{ m }^{ 2 }$

The answer :

$\boxed { 4\quad c{ m }^{ 2 } }$

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4 years ago

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