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Zinaida [17]
3 years ago
8

HELP PLZZZZ !!!!!!!!!!!!

Mathematics
1 answer:
jeyben [28]3 years ago
4 0
The answer to your question is B
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Me ajudem com a 3º questão
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
2 years ago
A plate has a diameter of 4 inches . What is the area of the plate ?
igor_vitrenko [27]

Answer:

12.56 inches^2

Step-by-step explanation:

To solve this we use pi*r^2

Radius is diameter/2

so the equation is pi*2^2

pi*4

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6 0
3 years ago
Read 2 more answers
In ΔOPQ, the measure of ∠Q=90°, OQ = 80, QP = 39, and PO = 89. What ratio represents the cosecant of ∠P?
Serjik [45]

Answer:

cos(O) = 39 / 89

Step-by-step explanation:

Given:

ΔOPQ, where

∠Q=90°

PO = 89

OQ = 39

QP = 80

cosine of ∠O?

cos(O) = Adjacent / Hypotenuse

cos(O) = 39 / 89

3 0
3 years ago
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Pls answer x-24=58; x=82<br>yes I know its easy
MatroZZZ [7]
I think you solved it on your own because x is 82
4 0
3 years ago
Read 2 more answers
Help me out 1+1=?
lesantik [10]

Answer:

Is it 2?

Step-by-step explanation:

8 0
3 years ago
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