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3 years ago

Please help ! <3 I would really appreciate it

Mathematics

1 answer:

Alex Ar [27]3 years ago

5 0

The answer is 2. The numerator adds to -8 while the denominator adds to -2. Divide them and get 4.

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A 95% confidence interval for a population mean is determined to be 100 to 120. if the confidence coefficient is reduced to 0.90

Lerok [7]

For 95% CI
x - 0.05s = 100
x + 0.05s = 120
Solve for x and s

The interval for u with 90% is
x - 0.10s
and
x + 0.10s
Substitute x and s

4 0

3 years ago

What is an equation of the line that passes through the point (-1,-3)(−1,−3) and is perpendicular to the line x-2y=14x−2y=14?

Ronch [10]

Answer:

No Solution

Step-by-step explanation:

The equations given are:

x-2y=14

14x-2y=14

The only solution to this system is (0, -7) and therefore there is No Solution.

6 0

3 years ago

How to write the decimal for 762-222-2945

aalyn [17]

Tht is equal to -2405

6 0

3 years ago

Which of the following statements would be correct to use when proving that limx→4(3x−4)=8?

Fudgin [204]

Answer:

Option c

Step-by-step explanation:

given that limit x tending to 4 of the function (3x-4) is 8

This implies for all values of x such that for epsilon >0 arbitrary small ,

$||x-4||$ , we get

|f(x)-8|<3epsilon

this is equivalent to the option c.

Proof:

Consider

$||x-4||$

Hence it follows that option C is right.

3 0

3 years ago

A manufactured product has a length that is normally distributed with a mean of 12 cm. The product will be unusable if the lengt

Sav [38]

Answer:

a) σ = 0,1612

b) P [ 11,75 < X < 12,35] = 0,92,44 or 92,44 %

Step-by-step explanation:

NOTE: I assume the unusable length s 11,5 and less

a) For a normal distribution, the probability of P = 0,01 corresponds to z(score) = -3,1 then:

- 3,1 = ( X - μ₀ ) / σ

- 3,1 = (11,5 - 12 )/ σ

-3,1 = - 0,5 / σ

σ = 0,1612

b) If σ = 0,1612

P [ 11,75 < X < 12,35]

z₁ (score) = ( 11,75 - 12 ) / 0,1612

z₁ = - 0,25/ 0,1612

z₁ = -1,55

From z table P [ 11,75 < X] = 0,0606

z₂ (score) = ( 12,35 - 12) / 0,1612

z₂ = 0,35 / 01612

z₂ = 2,17

From z table P [ X < 12,35] = 0,9850

Finally P [ 11,75 < X < 12,35] = 0,9850 - 0,0606

P [ 11,75 < X < 12,35] = 0,92,44 or 92,44 %

5 0

2 years ago