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aksik [14]
2 years ago
12

A circle has a diameter of 21 meters. What is the circumference of the circle? Use 22/7 for ∏.

Mathematics
1 answer:
bogdanovich [222]2 years ago
3 0

Answer:

66

Step-by-step explanation:

The diameter of the circle is 21. The formula for circumference is pie*radius*2. We don't have the radius but the diameter is just double the radius so just don't multiply by 2. 21 x 22 = 462. 46s divided by 7 is 66. Enjoy your answer :D

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If the variance of the data values in a population is 196, what is the standard deviation of the data values?
Natali [406]
The standard deviation is the square root of the variance

so if the variance is 196, then the standard deviation is the sqrt of 196, which is 14
4 0
2 years ago
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The sum of the fractions 2/y-3 and 6/y+3 is equal to their
Sphinxa [80]

Step-by-step explanation:

Move expression to the left side and change its sign

5

y

−

3

+

10

y

2

−

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−

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y

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Write

−

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as a sum or difference

5

y

−

3

+

10

y

2

+

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y

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−

y

y

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from the expression

5

y

−

3

+

10

y

(

y

+

2

)

−

3

(

y

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)

−

y

y

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2

=

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Factor out

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from the expression

5

y

−

3

+

10

(

y

+

2

)

(

y

−

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)

−

y

y

+

2

=

0

Write all numerators above the least common denominator

5

(

y

+

2

)

+

10

−

y

(

y

−

3

)

(

y

+

2

)

(

y

−

3

)

=

0

Distribute

5

and

−

y

through the parenthesis

5

y

+

10

+

10

−

y

2

+

3

y

(

y

+

2

)

(

y

−

3

)

=

0

Collect the like terms

8

y

+

20

−

y

2

(

y

+

2

)

(

y

−

3

)

=

0

Use the commutative property to reorder the terms

−

y

2

+

8

y

+

20

(

y

+

2

)

(

y

−

3

)

=

0

Write

8

y

as a sum or difference

−

y

2

+

10

y

−

2

y

+

20

(

y

+

2

)

(

y

−

3

)

=

0

Factor out

−

y

and

−

2

from the expression

−

y

(

y

−

10

)

−

2

(

y

−

10

)

(

y

+

2

)

(

y

−

3

)

=

0

Factor out

−

(

y

−

10

)

from the expression

−

(

y

−

10

)

(

y

+

2

)

(

y

+

2

)

(

y

−

3

)

=

0

Reduce the fraction with

y

+

2

−

y

−

10

y

−

3

=

0

Determine the sign of the fraction

−

y

−

10

y

−

3

=

0

Simplify

10

−

y

y

−

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=

0

When the quotient of expressions equals

0

, the numerator has to be

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10

−

y

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Move the constant,

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−

y

=

−

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Change the signs on both sides of the equation

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6 0
3 years ago
Read 2 more answers
Answer right with proof please.
Diano4ka-milaya [45]

Answer:

the answer is a

Step-by-step explanation:

you times the 1/6 by 2 to get 2/12 then 3/4 by 3 to get 9/12 so all your fractions have the same denominator and the do the rest of the math with the new fractions and the same whole numbers that went with them. hope this helps

7 0
2 years ago
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serg [7]

Answer:

1000

Step-by-step explanation:

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4 0
3 years ago
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What is the equivalent percent fraction for 1/2 3/4 7/10 3/20 4/25 9/50 1/8
ohaa [14]

Answer:1/2=0.5

3/4=0.75

7/10=0.7

3/20=0.15

4/25=0.16

9/50=0.18

1/8=0.125

Step-by-step explanation:

1/2=0.5

3/4=0.75

7/10=0.7

3/20=0.15

4/25=0.16

9/50=0.18

1/8=0.125

4 0
2 years ago
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