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kondaur [170]
2 years ago
15

Assume the radius of a circle is

Mathematics
1 answer:
Lisa [10]2 years ago
7 0

Answer:

Step-by-step explanation:

They want you to see how radius is important.  Just remember that one radian is one radius,  that should help  you see why radius is important.

They ask for the unit circle ,  that is a circle of one unit for the radius,  which makes it super easy to calculate things for it,  they ask what is the area, which is that famous formula, πr^{2} ,  then they ask what's its circumference.  which is that other famous formula  2πr

so to go all the way around a circle of one unit radius,  it's  2π  exactly or about 6.28..... units,   call it meters, or feet or inches, it doesn't mater here.

the size of the circle doesn't matter here either,  b/c we are using the radius ,  that relaationship doesn't change ,  all circles,  what ever size , have this same relationship between the radius and radians.    :P  this is handy.  

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5x + 9 = 5 + 3x : solve
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5x - 9 = 5 - 3x

5x - 3x = 5 - 9

2x = -4

X = \frac{-4}{2} = -2

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Hope this helped you.

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5 0
4 years ago
Fifteen more than twice a number 9 is
Leokris [45]
The question is asking 15+2*9=? so to do this first multiply 2*9 which = 18 and then add 15, 18+15= 33
6 0
3 years ago
Read 2 more answers
Graph the function<br> Need help ASAP plz
sattari [20]

Given:

The equation of a function is

y=(x-4)^2+1

To find:

The graph of the given function.

Solution:

The vertex form of a parabola is

y=(x-h)^2+k        ...(i)

Where, (h,k) is vertex of the parabola.

We have,

y=(x-4)^2+1         ...(ii)

From (i) and (ii), we get

h=4, k=1

The vertex of the parabola is (4,1).

Now, the table of values is

x             y

2            5

3            2

4             1

5            2

6            5

Plot these points on a coordinate plane and connect them by a free hand curve.

The graph of given function is shown below.

5 0
3 years ago
5. Monday night it was -2.3°C. If the
ozzi

Answer:

-4.6

Step-by-step explanation:

-2.3-2.3=-4.6

8 0
2 years ago
If m XAB=32, what is m BAC?
dalvyx [7]
The picture in the attached figure

we know that
<span>The construction shown is an angle bisector
m<XAB=m<CAX
</span>so
m<BAC=2*[m<XAB]-----> 2*32°----->m<BAC= 64°

the answer is
m<BAC=64°

3 0
4 years ago
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