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4 years ago

What is 2/3+4/5 simplified ?

Mathematics

2 answers:

11Alexandr11 [23.1K]4 years ago

6 0

Answer:

$\frac{2}{3} + \frac{4}{5}$

$= \frac{10 + 12}{15}$

$= \frac{22}{15}$

$= 1 \frac{7}{15}$

vichka [17]4 years ago

6 0

Answer:

1 3/20 or in decimal form is 1.15

Step-by-step explanation:

Make the denominators the same as the LCD.

Simplify. Denominators are now the same

Join the denominators.

Simplify.

Convert to mixed fraction.

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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)

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

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3 years ago