3 years ago

Please help me! I will give brainliest

Mathematics

1 answer:

Nuetrik [128]3 years ago

7 0

Answer:

Malfoy

Step-by-step explanation:

Draco,Malfoy

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4x^4
so the answer would be
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Five times of a number divided by 7 more than the number.If the result is 2 then what is the orignal number.

Darya [45]

Answer:

n = 14/3 or 4 2/3

Step-by-step explanation:

n = a number

5n/(7+n) = 2

cross-multiply to get:

5n = 2(7+n)

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3 years ago

Suppose x is a normally distributed random variable with μ = 50 and Ϭ = 3. Find a value of the random variable, call it x0, such

mihalych1998 [28]

Answer:

Step-by-step explanation:

Given that X is N(50,3)

So whenever we want score for x, we can convert this to Z and use std normal distribution table.

The formula for conversion is

$Z = \frac{x-50}{3}$

Using this we can find out the corresponding scores

a) $P(X\leq X_0) = 0.8413$

Z value = 1 and hence

$X_o = 50+1(3) = 53\\$

b) $P(x > x0) = 0.25$

$z=0.5-0.0987=0.4013\\X0= 50+3(0.4013)\\= 51.2039$

c) $P(x > x0) = 0.95\\z=2\\X_0 = 50+6 =56$

d) $P(41 ≤ x < x0) = 0.8630 \\P(-3 ≤ Z$

e) 10th percentile is $50-1.28(3) =46.16$

f) This is 99th percentile

= $50+2.33(3)\\= 56.69$

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3 years ago