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just olya [345]
3 years ago
14

Find the area of a circle

Mathematics
1 answer:
crimeas [40]3 years ago
8 0
R=5
A=πr^2
The area of the circle ≈78.54


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In parallelogram ABCD , diagonals AC and BD intersect at point E, BE=x^2−40 , and DE=6x .What is BD ? The answer was 120
Leviafan [203]

Answer:

120

Step-by-step explanation:

Given that ABCD is a parallelogram.  

We know that in a parallelogram diagonals bisect each other.

Since AC and BD intersect at E, we get E is the mid point of both AC and BD.

Or BE = ED

Substitute the given values for BE and ED

x^2-40 = 6x\\x^2-6x-40=0\\(x-10((x+4) = =0

i.e. x =10 or x =-4

But x cannot be negative .  So x can take only value 10

BE = DE =6x = 6(10) = 60

Diagonal BD = BE+DE = 60+60 = 120

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creativ13 [48]

Answer:

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Step-by-step explanation:

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3 years ago
Is the product of -4 and -7 positive or<br> negative? Why?
Kobotan [32]
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Find a value of 3a+4b when a=17 and b=9. Then use the formula v=u+at when the initial velocity is 3 m/s, the acceleration is 1.5
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