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Dmitriy789 [7]
3 years ago
14

2 concentric circles have radii 2cm and 3cm respectively, calculate the ratio of their areas​

Mathematics
1 answer:
VikaD [51]3 years ago
6 0

Answer:For the first circle the radius is 2cm and for the second circle the radius is 3cm,by taking the ratio of their areas:

πr^2:πR^2

π cancels out and we are left with only r^2:R^2

r=2cm and R=3cm

Therefore r^2:R^2=2^2:3^2

=4:9

The answer is 4:9

Step-by-step explanation:

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astra-53 [7]

Answer:

y = 7/8x + 1

Step-by-step explanation:

According to y = mx + b, whereas b is the y-intercept

so if b is positive, b has to be larger than 0

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3 0
2 years ago
Evaluate: 955-105 x 4 +118
drek231 [11]

Answer: −420x+1073

Step-by-step explanation:

Let's simplify step-by-step.

955−105x(4)+118=955+−420x+118

Combine Like Terms:

=955+−420x+118=(−420x)+(955+118)=−420x+1073

Answer: =−420x+1073

6 0
3 years ago
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In the trapezoid ABCD ( AB ∥ CD ) point M∈ AD , so that AM:MD=3:5. Line l ∥ AB and going trough point M intersects diagonal AC a
geniusboy [140]

Answer:

BC:BN=8:3

Step-by-step explanation:

ABCD is a trapezoid and there is a point m which belongs to AD such that AM:MD=3:5.Line "l" parallel to AB intersects the diagonal AC at p and BD at N.

Now, we know that the parallel lines divide the transversal into the segments with equal ratio, therefore, BN:NC=AM:MD

But, BC= BN+NC

Therefore, BC:BN=(BN+NC):BN

⇒BC:BN=(3+5):3

⇒BC:BN=8:3


4 0
3 years ago
50 points! Dustin and Melanie are playing a game, where two standard, six-sided number cubes are rolled, and the sum of their ou
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Melanie made a better decision


Hope I helped!

Let me know if you need anything else!

<span>~ Zoe (Rank:'Genius')</span>
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Paraphin [41]

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Step-by-step explanation:

Hope this helps have a good day

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