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3 years ago

Plz help!!!!!!!!!!!!

Mathematics

2 answers:

Charra [1.4K]3 years ago

5 0

Answer: rational

Step-by-step explanation:

$\dfrac{1}{4}=0.25\\\\\text{Since the decimal terminates (ends), it is a rational number.}$

leonid [27]3 years ago

3 0

Answer:

rational

Step-by-step explanation:

any number that can be written as a fraction is rational, it is also a termintating decimal.

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What is the vertex of the parabola whose equation is y = (x- 1)2 + 3?

guapka [62]

51672839430

78920-39248373165374895764

67423890283723674987

5 0

4 years ago

Multiplying - make sure your answer is in fraction form.

IceJOKER [234]

Answer:

Multiplying - make sure your answer is in fraction form.

1.4 x 0.8 = 28/25

2.3 x 1.8 =207/50

2.37 x 1.2 =721/250

6 0

3 years ago

(PLEASE SOMEONE HELP ME) (No Links!)

bearhunter [10]

A. 28.26 sq in

Explanation:
The formula for the area of a circle is πr^2.
r represents the radius. Since the radius is 3, we can plug it in to find the answer.
π3^2
9π
9(3.14) = 28.26

Hope this helps! Please give brainliest if you can

4 0

3 years ago

Cos(100)-cos(99)=? Can you do it step by step

Svetllana [295]

Let's see what to do buddy...

________________________________

If 99 & 100 are in Degree

_________________________________

STEP (1)

The angles 99 and 100 are in the second quarter of the trigonometric circle.

The cosine is negative in the second quarter.

To make things easier, we can use angle conversion.

Look :

$we \: know \: that \: 100 = 90 + 10$

$also \: we \: know \: 99 = 90 + 9$

So :

$\cos(100) = \cos(90 + 10) = \cos( \frac{\pi}{2} + 10 ) \\$

$\cos(99) = \cos(90 + 9) = \cos( \frac{\pi}{2} + 9 ) \\$

_________________________________

STEP (2)

Well now we have to do the arc deletion.

To remove the arc, we remove π/2 from the arc.

Remember that every time we remove π/2 from the arc, the trigonometric ratio changes.

That is, if it is a sine, it becomes a cosine, and if it is a cosine, it becomes a sine.

Or if it is a tangent, it becomes a cotangent, and if it is a cotangent, it becomes a tangent.

$in \: second \: quarter \: cosine \: is \: negative \\ \\ \cos( \frac{\pi}{2} + 10 ) = - \sin(10) = - 0.173$

$\cos( \frac{\pi}{2} + 9 ) = - \sin(9) = - 0.156 \\$

_________________________________

STEP (3)

$\cos(100) - \cos(99) = \\ - \sin(10) - ( - \sin(9) \: ) = \\ - 0.173 - ( - 0.156) = \\ - 0.173 + 0.156 = - 0.017$

And we're done here.

_________________________________

If 99 & 100 are in Radian

_________________________________

STEP (1)

First we need to know how many degrees 1 radian is.

The following equation is used to convert degrees to radians or radians to degrees.

$\frac{degree}{180} = \frac{radian}{\pi} \\$

So we have :

$\frac{d}{180} = \frac{1}{\pi} \\$

Multiply the sides of the equation by 180 :

$d = \frac{180}{\pi} = \frac{180}{3.14} = 57.32 \\$

So 1 radian is approximately equal to 57 degrees.

And we have :

$100 \: rad \: = 100 \times 57 = 5700 \: deg \\ \\ 99 \: rad \: = 99 \times 57 = 5601 \: deg$

_________________________________

STEP (2)

Let's move on to deletion.

Look : 5700° = 15 × 360° + 300°

and : 5601° = 15 × 360° + 201°

We know π rad = 3.14 × 57 = 180° deg

So 2π rad = 2 × 180 = 360 ° deg

Then :5700 = 15 × 2 π + 300° = 30 π + 300°

and :5601 = 15 × 2 π + 201° = 30 π + 201°

Remember that deleting 2π is unconditional.

$\cos(30\pi + 300) = \cos(300) = \cos(360 - 60) = \cos(2\pi - 60) = \cos( - 60) = \\ cosine \: eat \: negative \\ \cos( - 60) = \cos(60) = \frac{1}{2}$

$\cos(30\pi + 201) = \cos(201) = \\ \cos(180 + 21) = \cos(\pi + 21) = \\ - \cos(21) = - 0.933$

$\frac{1}{2} - ( - 0.933) = 0.500 + 0.933 = 1.433$

And we're done.

Thanks for watching buddy good luck.

♥️♥️♥️♥️♥️

6 0

3 years ago

Type the equation for the graph below.

madreJ [45]

Answer:

Step-by-step explanation:

This is a "regular" sin graph that's "taller" than the original. The amplitude is 3; other than that, its period is the same and it has not shifted to the right or left, so the equation, judging from the graph, is

$y=3sin(x)$

7 0

3 years ago