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ipn [44]
3 years ago
6

A circle with circumference 20 has an arc with a 72 central angle.

Mathematics
1 answer:
ValentinkaMS [17]3 years ago
5 0

Answer:

4

Step-by-step explanation:

360 deg = 20

1 deg = 20/360

72 deg = 20/360 * 72 = 4

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Which of the following expressions is equal to 3x^2 + 27
Kisachek [45]
Factor: 
3x^2 + 27
= 3(x^2  + 9)
Answer is 3(x^2 + 9), when factored.


A) (3x + 9i)(x + 3i)
= (3x + 9i)(x + 3i)
= (3x)(x) + (3x)(3i) + (9i)(x) + (9i)(3i)
= 3x^2 + 9ix + 9ix + 27i^2
= 27i^2 + 18ix + 3x^2



B) (3x - 9i)(x + 3i)
= (3x +  - 9i)(x + 3i)
= (3x)(x) + (3x)(3i) + ( - 9i)(x) + (- 9i)(3i)
= 3x^2 + 9ix - 9ix - 27i^2
= 27i^2 + 3x^2


C) (3x - 6i)(x + 21i)
= (3x +  - 6i)(x + 21i)
= (3x)(x) + (3x)(21i) + (- 6i)(x) + ( -6i)(21i)
= 3x^2 + 63ix - 6ix - 126i^2
=  - 126i^2 + 57ix + 3x^2






D) (3x - 9i)(x - 3i)
=  (3x +   - 9)(x +  - 3)
= (3x)(x) + (3x)( - 3i) + (- 9)(x) + ( - 9)( - 3i)
= 3x^2 - 9ix - 9x + 27i
= 9ix + 3x^2 + 27i - 9x









Hope that helps!!!

8 0
3 years ago
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Describe the pattern for the powers of 10. Write the values of 10*1and 10*0<br> in the table.
blagie [28]

Answer:

here

Step-by-step explanation:

I uh hope this helps...

3 0
2 years ago
Can you help me please​
svetoff [14.1K]

Answer:

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6 0
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geniusboy [140]

Answer:

(2.54×12) ×5280

Step-by-step explanation:

Since there are 2.54cm in an inch, multiply 2.54 by 12 to find out how many cm there are in a foot. Then you multiply that by 5280

8 0
3 years ago
In a Black Friday sale, if you buy 5 video games for $ 39.99 each, you get 1 free. After the offer, how much does each video gam
Kruka [31]

Answer:

$200.00

Step-by-step explanation:

Round the $39.00 to $40.00 then add it all together because you can't forget the taxes.

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