3 years ago

12X-7X(1-9X)=-3+9X(7X-1)

1 answer:

5 0

What are you solving for? X?

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Lynna [10]

You find the circumference of a full circle so 2πr =43.98
then divide by 4=10.995
so the answer is 10.995cm

3 0

3 years ago

grandymaker [24]

The answer is c , between 52.43 and 64.20

3 0

3 years ago

Nikitich [7]

-15 hope this helps :0

3 0

2 years ago

Oksana_A [137]

Answer:

don't click the link/search the link to the other answer.

Step-by-step explanation:

trust me it's bad

7 0

3 years ago

Alisiya [41]

I can't read that language but I'll guess it says write a second degree equation then solve for n when d=10.

$10 = \dfrac{n(n-3)}{2}$

$20 = n^2 - 3n$

$n^2 - 3n - 20 = 0$

Answer: n² - 3n - 20 = 0

That doesn't factor so there is no integer n solution.

That means there are no polygons with 10 diagonals.

$n = \frac 1 2(3 \pm \sqrt{89})$

7 0

3 years ago