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Vlad1618 [11]
3 years ago
6

What is the radius of the circle? Example how you know..

Mathematics
2 answers:
Lostsunrise [7]3 years ago
7 0

Answer:

The radius of the circle is 7 units.

Step-by-step explanation:

Radius is the measure from the center point of a circle to a point on the outside edge. Since you have coordinates, you can find the radius using distance formula.

<em>You could also just count how many units are between the center and the edge to get 7 units because 8 - 1 = 7</em>

xxTIMURxx [149]3 years ago
3 0

Answer:

r=7

Step-by-step explanation:

C is at x=1 at circle side is at 8

8-1= 7

so, r=7

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2+34-8+23-22hhhuh<br> yanelzi
guapka [62]

Answer:

29

Step-by-step explanation:

7 0
3 years ago
A helicopter is flying above a town. the local high school is directly to the east of the helicopter at a 20° angle of depressio
guapka [62]
Answer: 4.5 miles

Explanation:

When you draw the situation you find two triangles.

1) Triangle to the east of the helicopter

a) elevation angle from the high school to the helicopter = depression angle from the helicopter to the high school = 20°

b) hypotensue = distance between the high school and the helicopter

c) opposite-leg to angle 20° = heigth of the helicopter

d) adyacent leg to the angle 20° = horizontal distance between the high school and the helicopter = x

2) triangle to the west of the helicopter

a) elevation angle from elementary school to the helicopter = depression angle from helicopter to the elementary school = 62°

b)  distance between the helicopter and the elementary school = hypotenuse

c) opposite-leg to angle 62° = height of the helicopter

d) adyacent-leg to angle 62° = horizontal distance between the elementary school and the helicopter = 5 - x

3) tangent ratios

a) triangle with the helicpoter and the high school

tan 20° = Height / x ⇒ height = x tan 20°

b) triangle with the helicopter and the elementary school

tan 62° = Height / (5 - x) ⇒ height = (5 - x) tan 62°

c) equal the height from both triangles:

x tan 20° = (5 - x) tan 62°

x tan 20° = 5 tan 62° - x tan 62°

x tan 20° + x tan 62° = 5 tan 62°

x  (tan 20° + tan 62°) = 5 tan 62°

⇒ x = 5 tant 62° / ( tan 20° + tan 62°)

⇒ x = 4,19 miles

=> height = x tan 20° = 4,19 tan 20° = 1,525 miles

4) Calculate the hypotenuse of this triangle:

hipotenuese ² = x² + height ² = (4.19)² + (1.525)² = 19.88 miles²

hipotenuse = 4.46 miles

Rounded to the nearest tenth = 4.5 miles

That is the distance between the helicopter and the high school.
5 0
3 years ago
Read 2 more answers
PLEASE HURRY PLEASSEEEE i need help
Arisa [49]

Answer:

5

Step-by-step explanation:

We cannot repeat an x value for the relation to be a function

Since x=3 ,4, 7 are already used

We must let x=5

5 0
3 years ago
40 liters is equal to
Julli [10]
Really it depends on what your trying to match it too

But it can be equal to
~10.5669 U.S liquid gallons
~40,000 milliliters 
~169.07 cups
~84.5351 pints

8 0
3 years ago
Translate the sentece into a equation
maw [93]
The answer would be 5x^3-2x^2=18

5 0
3 years ago
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