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Strike441 [17]
2 years ago
14

The mean of three numbers is 70. if two of the numbers are 55 and 65 what is the third number

Mathematics
2 answers:
Margarita [4]2 years ago
6 0
90
55+65=120
there are 3 numbers and when you divide them it makes 70.
70 x 3 = 210
210 - 120 = 90
55 + 65 + 90 = 210
210 / 3 = 70
Evgesh-ka [11]2 years ago
4 0
I thin the third number would be 90 because if the mean of 3 numbers is 70 then multiply 70 an three and you get 210. Then add 55 and 65 and you get 120.Then do 210-120 and you get 90 so 90 is the third number.
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Discriminant= = -32

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(-b+√x)/2a= (-2+2√-2)/3

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(-b+√x)/2a= (-1+√-11)/3

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For 9x^2-6x+2=0

Discriminant= -36

The solutions

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Step-by-step explanation:

Formula for the discriminant = b²-4ac

let the discriminant be = x for the equations

The solution of the equations

= (-b+√x)/2a and = (-b-√x)/2a

For 3x^2+4x+4=0

Discriminant= 4²-4(3)(4)

Discriminant= 16-48

Discriminant= = -32

The solutions

(-b+√x)/2a =( -4+√-32)/6

(-b+√x)/2a= (-4 +4√-2)/6

(-b+√x)/2a= (-2+2√-2)/3

(-b-√x)/2a =( -4-√-32)/6

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Discriminant= 4-48

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(-b+√x)/2a= (-1+√-11)/3

(-b-√x)/2a =( -2-√-44)/6

(-b-√x)/2a= (-2 -2√-11)/6

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