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3 years ago

What’s 80 percent in fractions

Mathematics

2 answers:

lara31 [8.8K]3 years ago

5 0

Answer:

8/10 or 4/5

Step-by-step explanation:

the decimal form of 80% is 80. meaning you have 80 parts of 100, then this fraction can be further reduced to to 4/5 if needed

Greeley [361]3 years ago

4 0

The answer to that is 80 percent as a fraction is 8/10

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20 is 60% of what number

Lilit [14]

Answer:

33.33

Step-by-step explanation:

60% of 33.33 is 20. 100% of 33.33 is 33.33, therefore 60 percent of 33.33 equals 20.

3 0

3 years ago

Read 2 more answers

If cos Θ = square root 2 over 2 and 3 pi over 2 < Θ < 2π, what are the values of sin Θ and tan Θ? sin Θ = square root 2 ov

densk [106]

Answer:

$\huge\boxed{\sin\theta=-\dfrac{\sqrt2}{2};\ \tan\theta=-1}$

Step-by-step explanation:

We have:

$\\cos\theta=\dfrac{\sqrt2}{2},\ \dfrac{3\pi}{2}$

For sine use:

$\sin^2x+\cos^2x=1\to\sin^2x=1-\cos^2x$

Substitute:

$\sin^2\theta=1-\left(\dfrac{\sqrt2}{2}\right)^2\\\\\sin^2\theta=1-\dfrac{(\sqrt2)^2}{2^2}\\\\\sin^2\theta=1-\dfrac{2}{4}\\\\\sin^2\theta=\dfrac{4}{4}-\dfrac{2}{4}\\\\\sin^2\theta=\dfrac{4-2}{4}\\\\\sin^2\theta=\dfrac{2}{4}\to\sin\theta=\pm\sqrt{\dfrac{2}{4}}\\\\\sin\theta=\pm\dfrac{\sqrt2}{\sqrt4}\\\\\sin\theta=\pm\dfrac{\sqrt2}{2}$

θ in IV quadrant, therefore sine is negative.

$\sin\theta=-\dfrac{\sqrt2}{2}$

For tangent use:

$\tan x=\dfrac{\sin x}{\cos x}$

Substitute:

$\tan\theta=\dfrac{-\frac{\sqrt2}{2}}{\frac{\sqrt2}{2}}=-\dfrac{\sqrt2}{2}\cdot\dfrac{2}{\sqrt2}=-1$

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3 years ago

What is the LCM of 37 and 12?

artcher [175]

$37|37 \\ 1 \\ \\ 12|2 \\ 6 \ |2 \\ 3 \ |3 \\ 1 \\ \\ 12=2^2*3 \\ \\ L.C.M(37;12)=444$

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4 years ago

Alissa cut a piece of string that was 17feet long. Darnell cut a piece of string that was 5 yards long. Alissa wanted to cut her

Anna71 [15]

The answer is 12 feet I got this because 17-5=12

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3 years ago

Is the figure a rectangle? Explain.

Sphinxa [80]

Here is the first sign that should tell you this isn't a rectangle.

d=_/w^2+l^2 is the equation to solve the diagonal of a rectangle

if you plug in 21 and 20, d would equal 29 not 28 so for that reason alone it is not a rectangle.

I am about 90% sure the correct answer is B. I hope this helps let me know if I was right.

Option B!

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3 years ago