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vichka [17]
3 years ago
8

REALLY NEED HELP, PLEASE HELP ME

Mathematics
1 answer:
sveta [45]3 years ago
6 0

x^2 + y^2 -8x -6y +21 = 0

centre = -(-8)/2, -(-6)/2

= 4, 3

radius = √(4^2) + 3^2 - 21

= √(16 +9 -21)

= √(25 -21)

= √4

= 2

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What is the area of the regular hexagon ABCEF? Explain your reasoning.
Reil [10]

Answer:

1350\sqrt{3} units²

Step-by-step explanation:

The regular hexagon consists of 6 equiangular triangles

The area (A) of a equilateral triangle is calculated as

A = \frac{s^2\sqrt{3} }{4} ( s is the side length )

Here s = 30 , then

A = \frac{30^2\sqrt{3} }{4} = \frac{900\sqrt{3} }{4} = 225\sqrt{3} units²

Thus the area of the regular hexagon is

area = 6 × 225\sqrt{3}

        = 1350\sqrt{3} units² ← exact value

         ≈ 2338.3 units² ( to 1 dec. place )

4 0
2 years ago
You are making several purchases from the b-better electronics store. You can buy from this store online or in a physical store.
alexandr402 [8]

Answer:

Online Ordering is better.

Step-by-step explanation:

So you now that you save 20% if you to physical store and you save $20 if you go to the online store.

Say you are spending 100 dollars at the store to make it easy. 20% of one hundred is $20 so that is the same amount of money.

Now let’s look at the taxes and shipping so at the physical store you have to pay taxes no matter what but online you only do it if you purchase is less than $75 and we have $80 ($100–$20=$80) so at the physical store you have some amount of Mandy that is more than $80 because of taxes but if you buy online it will be exactly $80.

3 0
3 years ago
2 Points
masya89 [10]
The answer is 120. Because inscribed angle is Half of the arc measure. Double 60 and we get 120.
6 0
3 years ago
Read 2 more answers
X = A 21.6 B 12.9 C 9.1
Artist 52 [7]

Answer:

B: 12.9

Step-by-step explanation:

If A B and C are the alternatives, the answer is B: 12.9

The reason is that the hypotenuse can't be smaller than one of its sides, that eliminates alternative C.

And also, the hypotenuse can't be bigger than segments AC + BC, since the side AC is bigger and AC measures 10.8, the hypotenuse would have to measure < 21.6

Any questions, comment.

6 0
3 years ago
Read 2 more answers
A cookie factory uses 1/3 of a bag of flour in each batch of cookies. The factory used 2/3 of a bag of flour yesterday. How many
Mumz [18]

Answer:

They made 2 batches

Step-by-step explanation:

If the factory used ⅔, and 1 batch is ⅓, the factory made 1 batch for each 3rd they used. ⅔, 2 batches

7 0
3 years ago
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