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quester [9]
2 years ago
6

Please help me, this is frustrating!

Mathematics
2 answers:
vodka [1.7K]2 years ago
8 0
A) mes ∠ DAB) = mes ARC DAB/2

if mes ARC DAB = 40° , then mes DAB = 20

b) ∠ BDA  is inscribed in half cercle, so its mesure is 90°

c) ∠DBA =90° - 20° = 70° (COMPLEMENTARY angles in a right triangle)

d) LENGTH OF ARC DB:

The central angle DCB = mes ARC DB = 40°;

 Arc LENGTH = (40°) * (2πR)/360°, with R = 12 and π ≈ 3.14

Arc Length = (40°)*2*3.14*12/360 = 8.37 CM
kolbaska11 [484]2 years ago
5 0
Check the picture below


for the DB length, make sure your calculator is in Degree mode, since the angles are in degrees.

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which number set(s) does -10 belong toirrational numberswhole numbersrational numbersintegersreal numberscounting or natural num
yKpoI14uk [10]

Given:

The number is -10.

To describe the number:

Explanation:

Since 10 is a whole number and it has a minus sign.

So, -10 is an integer number.

Since it is an integer number.

So, it must be a rational number as well as the real number.

Therefore, -10 is a number that belongs to the sets

Integer numbers

Rational numbers

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Final answer:

• Integer numbers

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• Rational numbers

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6 0
1 year ago
If the equation x² - kx - 36 = 0 has x = 12 as one root, what is the value of k?
sergiy2304 [10]
To solve for k, just plug in the x provided:

12^2 - k(12) - 36 = 0

144 - k(12) = 36

-k(12) = 1/4

k = -1/48
5 0
2 years ago
What is between 1/3 and 87/100 on a number line
Tanzania [10]
1/3 = 0.333333   87/100 = 0.87
3 0
3 years ago
Read 2 more answers
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Lubov Fominskaja [6]
I don't really have a calculator on me. But I'll tell you how to go through it.
So the formula for the area of a circle is Pi x radius^2.
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8 0
3 years ago
Answer in the comment section or else
Crazy boy [7]

Answer:

The answer is the fourth option: 9 mm^3

Step-by-step explanation:

6/2=3

4/2=2

3/2=1.5

3*2*1.5=9

6 0
2 years ago
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