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3 years ago

if the area of a circle is represented by A=21π, what is the radius of the circle? round your answer to the nearest tenth

Mathematics

1 answer:

Reptile [31]3 years ago

5 0

The equation is actually
circle area = PI * radius^2
radius = square root (area / PI)

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What is 9 10????????????????????????????

kozerog [31]

9+10=?
9 = 3x3
10= 5x2
3 (from 3x3) x 5 (from 5x2) = 15
3 (from 3x3) x 2 (from 5x2) = 6
15+6=21
Therefore 9+10=21

5 0

3 years ago

4x = -36<br> plz helpppp

san4es73 [151]

Hi there! :)

4x=-36

Divide both sides by 4 in order to isolate x:

x=-9

Hope this helps you and have a nice day!

~Just a joyful teen

$SilentNature$

8 0

2 years ago

(3ab+2c)^3 what is the answer

svet-max [94.6K]

Answer:

$=27a^3b^3+54a^2b^2c+36abc^2+8c^3$

Step-by-step explanation:

$(3ab+2c)^3$

$=(3ab+2c)$ × $(3ab+2c)$ ×

$=(3ab+2c)(9a^2b^2+12abc+4c^2)$

$=(3ab)(9a^2b^2)+(3ab)(12abc)+(3ab)(4c^2)+(2c)(9a^2b^2)+(2c)(12abc)+(2c)(4c^2)$

$=27a^3b^3+36a^2b^2c+12abc^2+18a^2b^2c+24abc^2+8c^3$

$=27a^3b^3+54a^2b^2c+36abc^2+8c^3$

<em>hope this helps....</em>

5 0

3 years ago

Per

Levart [38]

Answer:

1. 5200+5200=10400

2. 10400-361=10039

Branlyist pls

8 0

3 years ago

In the following activity, match each pair of equivalent expressions.

Vilka [71]

Answer:

1. -8+3x

2. 51x-2+4x2 (squared)

3. 66x +324

4. 6x+2

5. 13 +13x

Step-by-step explanation:

I don't think I really understand the question but I tried to simplify the equations

8 0

3 years ago