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Nana76 [90]
4 years ago
8

A 99% confidence interval for the actual mean noise level in hospitals is

Mathematics
1 answer:
UNO [17]4 years ago
3 0

Answer:

Is this advanced math?Brcausee

Step-by-step explanation:

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Instructions: Determine if AB is tangent to the circle.
OverLord2011 [107]

Step-by-step explanation:

to be a tangent, it would have to have a 90° angle with the radius (12).

and that would make the triangle ABCenter of the circle a right-angled triangle.

and then Pythagoras must apply :

c² = a² + b²

with c being the Hypotenuse (the baseline opposite of the 90° angle). in our case the 20-line.

so,

20² = 12² + 16²

400 = 144 + 256 = 400

yes, it is confirmed, because the Pythagoras principle applies, it is a right-angled triangle, and therefore AB is indeed a tangent.

7 0
3 years ago
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The measure of this angle is 151. What is the measure of its supplementary angle
pishuonlain [190]

Answer:

180-151 = 29 degrees

this is the right answer

5 0
3 years ago
Find the area of the regular polygon. round your answer to the nearest tenth.
Ber [7]
Area = 1/4√(5(5+2√5))a^2. a is the length of a side. If you plug in 10 as a, you get approximately 172, which is about the same as the 1st option .
8 0
3 years ago
Can somebody help me <br> -2(x+5)
Anika [276]

Answer: -2x - 10

Steps: -2(x+5)

Apply the distributive law [ a(b + c) = ab + ac ]:

a = -2,  b = x,  c = 5

-2x + (-2) × 5

Apply minus/plus rules: -2x - 2 × 5

Multiply the numbers: 2 × 5 = 10

-2x - 10

Plz mark brainliest:)

5 0
3 years ago
A line passes through point (3, 7) and has a slope of 3/4 .
olya-2409 [2.1K]
Y=(3/4)(x)+(19/4)
5=(3/4)(x)+(19/4)
(1/4)=(3/4)(x)
x=(1/3)
4 0
3 years ago
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