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3 years ago

Help me solve this thanks!!1 : )

Mathematics

2 answers:

S_A_V [24]3 years ago

7 0

Answer:

a= -6

Step-by-step explanation:

Try Photo Math! Step by step instructions to help you understand math better!

dolphi86 [110]3 years ago

3 0

The answer to the problem is a=-6

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PLZ HELP I GIVE BRAINLIST!!

Tom [10]

Answer:

Step-by-step explanation:

X + 2y = 13

Since x = 3

3 + 2y = 13

2y = 13 - 3

2y = 10

Divide both sides by 2

Y = 5

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3 years ago

Suppose the sediment density (g/cm3 ) of a randomly selected specimen from a certain region is known to have a mean of 2.80 and

Irina18 [472]

Answer:

0.918 is the probability that the sample average sediment density is at most 3.00

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 2.80

Standard Deviation, σ = 0.85

Sample size,n = 35

We are given that the distribution of sediment density is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

Standard error due to sampling:

$=\dfrac{\sigma}{\sqrt{n}} = \dfrac{0.85}{\sqrt{35}} = 0.1437$

P(sample average sediment density is at most 3.00)

$P( x \leq 3.00) = P( z \leq \displaystyle\frac{3.00 - 2.80}{0.1437}) = P(z \leq 1.3917)$

Calculation the value from standard normal z table, we have,

$P(x \leq 3.00) = 0.918$

0.918 is the probability that the sample average sediment density is at most 3.00

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3 years ago

What slope does a horizontal line have?

ioda

Answer:

Step-by-step explanation:

Horizontal

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geniusboy [140]

Answer:

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Step-by-step explanation:

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