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Vinvika [58]
3 years ago
11

eq 5" align="absmiddle" class="latex-formula">
Mathematics
1 answer:
nikdorinn [45]3 years ago
5 0

Answer:

x^2-7x+3=0

Step-by-step explanation:

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ElenaW [278]

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equal

Step-by-step explanation:

Most quadratic equations have <em>equal</em> roots.

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How would you teach something you have learned this year in Math to someone younger than you? Write more than 5 sentences.​
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4 0
2 years ago
the diameters of Douglas firs grown at a Christmas tree farm are normally distributed with a mean of 4 inches and a standard dev
aksik [14]

Answer:

Proportion of the trees will have diameters between 2 and 6 inches = 0.8164

Step-by-step explanation:

Given -

Mean (\nu )  = 4

Standard deviation (\sigma  ) = 1.5

Let X be the diameter of tree

proportion of the trees will have diameters between 2 and 6 inches =

P(2<  X<  6)   =  P(\frac{2 - 4 }{1.5}< \frac{X - \nu }{\sigma}<  \frac{6 - 4 }{1.5})

                         = P(\frac{-2 }{1.5}< Z<  \frac{2 }{1.5})     Put  [Z = \frac{X - \nu }{\sigma}]

                         =  P(-1.33< Z<  1.33)

                          = (Z<  1.33) - (Z<  -1.33)

                          = .9082 - .0918

                           = 0.8164

6 0
3 years ago
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