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TiliK225 [7]
3 years ago
15

Help me pleaseee i don’t know this

Mathematics
1 answer:
Lera25 [3.4K]3 years ago
5 0

Answer:

the answer is B because y depends on x

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zhuklara [117]

none of the above, -90 and 270 are the same position on the unit circle


6 0
3 years ago
Answer again plsss sorry thanks if you helped
cestrela7 [59]

Answer:

20% and 95%

Step-by-step explanation:

I know this is correct trust me!

7 0
3 years ago
Read 2 more answers
Find the measure of the exterior angle.
Scrat [10]

Answer:

125

Step-by-step explanation:

the anterior angle is 55

the exterior angle =180 - 55 = 125

6 0
2 years ago
The circumference of Fis 120 cm. What is the length of DË (the minor<br> arc)?
Afina-wow [57]

Answer:

15cm

Step-by-step explanation:

Let x be the arc circumference.

The circumference  of a circle usually subtends to 360°, that is, one complete revolution is 360°.

#Given the arc angle as 45° and the  circumference as 120cm, the arc circumference can be obtained as:

#Apply proportions to find x:

360\textdegree=120cm\\45\textdegree=x\\\\x=(120/360)\times 45\\\\x=15cm

Hence, the arc circumference is 15cm

6 0
3 years ago
A radio antenna is kept perpendicular to the ground by three wires of equal length. The wires touch the ground at three points o
Elena-2011 [213]

Answer:

The coordinates of the base of the antenna is (-6. 1)

Step-by-step explanation:

Here  we are required to find the center of a circle given points on the circumference

The equation of  a circle is

(x - h)² + (y - k)² = r²

Where:

x and y are points on the circumference

h and k are coordinates of the center of the circle and

r = The radius of the circle

Since we have the values for the points on the circumference, we are left with three unknowns, which we can find with three equations as follows;

By plugging in the values for x and y at the respective points we get,

At (9, -19) → (9 - h)² + (-19 - k)² = r²...............(1)

At (-21, -19) → (-21 - h)² + (-19 - k)² = r².....,...(2)

At (14, 16 ) → (14 - h)² + (16 - k)² = r² ............(3)

Solving, we get  from (1)  (-19 - k)² = r² - (9 - h)²

Plugging in the value of (-19 - k)² in equation (2) we get

(-21 - h)² + r² - (9 - h)² = r²

So that (-21 - h)²  - (9 - h)² = r² -  r² = 0

and   (-21 - h)²  - (9 - h)² = 0 gives

60·h +360 = 0 or h = -6

Plugging in the value of h = -6 in equation (3) we get

(14 - (-6))² + (16 - k)² = r²

20² + (16 - k)² = r² .................(4)

similarly from equation (1) we get

(9 - (-6))² + (-19 - k)² = r²

15² + (-19 - k)² = r²  ................(5)

Subtracting equation (5) from (4) gives

20² - 15² +  (16 - k)² - (-19 - k)² = 0

Which gives

-70·k + 70 = 0

or k = 1

Therefore the coordinates of the base of the antenna = (-6. 1).

6 0
3 years ago
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