3 years ago

If x=8 and y=−2, evaluate the following expression: 3x−y2

Mathematics

1 answer:

jok3333 [9.3K]3 years ago

8 0

Answer:

=28

Step-by-step explanation:

3(8)-(-2)2

24- -4

=28

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Answer:

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Step-by-step explanation:

Let the radius of the circle = r cm.

Then circumference of circle = 2 π r.

Since circumference exceeds the radius by 74 cm

Therefore, according to the question,

$\sf \:2 π r = r+ 74$

$\sf \: = > 2 \times \frac{22}{7} \times r = r \: + 74$

$\sf \: = > \frac{44r}{7} -r = 74$

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$\sf \: = > \frac{37r}{7} = 74$

$\sf \: = > r = \frac{7 \times 74}{37}$

$\sf \: = > r = 14$

Hence, the radius of the circle is 14 cm.

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