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3 years ago

Solve the equation. 89=x+13(7)

Mathematics

2 answers:

BabaBlast [244]3 years ago

8 0

89= x=13(7)
13*7=91
91-89=2
x=2
89= -2+13(7)

marissa [1.9K]3 years ago

5 0

Answer is x=-2 hope that helps

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Can u answer this mathematics question and show your work

Mnenie [13.5K]

See this solution/explanation (answer is '7 meters'):

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2. The phrase 'height of 343 meters' means y=343.

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x=7 [m] - how far from the start of the lift hill...

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Minchanka [31]

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4 0

3 years ago

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mariarad [96]

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5 0

2 years ago

Read 2 more answers

A population of monkeys' tail lengths is normally distributed with a mean of 25 cm with a standard deviation of 8 cm. I am prepa

Crank

Answer:

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

P(24 ≤X⁻≤25) = 0.4772

Step-by-step explanation:

Step(i):-

Given mean of the Population 'μ'= 25c.m

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

Given sample size 'n' = 256

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:-

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

P(24 ≤X⁻≤25) = 0.4772

4 0

3 years ago