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NNADVOKAT [17]
2 years ago
6

The circumference of a circle is 9m What is the area of the circle?

Mathematics
1 answer:
vazorg [7]2 years ago
3 0

Answer:

Cai on kgpkvugcg7 vgu ygvhy6vgvh7

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What is the value of a in the equation 3a+b=54, when b=9?
insens350 [35]

3a+9=54

3a+9-9=54-9

3a= 45

a=15

Check answer:

3(15)+9=54

54=54

Answer is a=15

3 0
3 years ago
How many different ways are there to choose a subset of the set {1,2,3,4,5,6} so that the product of the members of the subset i
zvonat [6]

You have to pick at least one even factor from the set to make an even product.

There are 3 even numbers to choose from, and we can pick up to 3 additional odd numbers.

For example, if we pick out 1 even number and 2 odd numbers, this can be done in

\dbinom 31 \dbinom 32 = 3\cdot3 = 9

ways. If we pick out 3 even numbers and 0 odd numbers, this can be done in

\dbinom 33 \dbinom 30 = 1\cdot1 = 1

way.

The total count is then the sum of all possible selections with at least 1 even number and between 0 and 3 odd numbers.

\displaystyle \sum_{e=1}^3 \binom 3e \sum_{o=0}^3 \binom 3o = 2^3 \sum_{e=1}^3 \binom3e = 8 \left(\sum_{e=0}^3 \binom3e - \binom30\right) = 8(2^3 - 1) = \boxed{56}

where we use the binomial identity

\displaystyle \sum_{k=0}^n \binom nk = \sum_{k=0}^n \binom nk 1^{n-k} 1^k = (1+1)^n = 2^n

3 0
1 year ago
The sum of 3 times a number and 7 is equal to 2. Turn into an equation
sladkih [1.3K]
3x+7=2 is the equation
4 0
2 years ago
Read 2 more answers
Helpppppppppppppppppppp
yKpoI14uk [10]
Dude stop commenting that people need real answer not a link
5 0
2 years ago
<img src="https://tex.z-dn.net/?f=Tanx%20%3D%202%2F3" id="TexFormula1" title="Tanx = 2/3" alt="Tanx = 2/3" align="absmiddle" cla
zlopas [31]
The answer for x is 33.69°.
4 0
3 years ago
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