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3 years ago

Explain how to solve the equation 9=q-4

Mathematics

2 answers:

castortr0y [4]3 years ago

4 0

add them both then you get the awnser if the four is not a negative. if the four is a negative use division.

OlgaM077 [116]3 years ago

3 0

Q= 9+4
q= 13

its simple, the numbers are just in a different order, but you have look carefully. hope this helped :)

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3 years ago

Read 2 more answers

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3 years ago

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Answer:

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Step-by-step explanation:

Step(i):-

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Given standard deviation of the Population 'σ' = 8c.m

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Let X₁ = 24

$Z_{1} = \frac{x_{1}-mean }{\frac{S.D}{\sqrt{n} } } = \frac{24-25}{\frac{8}{\sqrt{256} } } = -2$

Let X₂ = 25

$Z_{2} = \frac{x_{2}-mean }{\frac{S.D}{\sqrt{n} } } = \frac{25-25}{\frac{8}{\sqrt{256} } } = 0$

Step(ii):-

The probability that the mean of my sample will be between 24 and 25 cm

P(24 ≤X⁻≤25) = P(-2≤ Z ≤0)

= P( Z≤0) - P(Z≤-2)

= 0.5 + A(0) - (0.5- A(-2))

= A(0) + A(2) ( ∵A(-2) =A(2)

= 0.000+ 0.4772

= 0.4772

Final answer:-

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3 years ago