2 years ago

Least common denominator 7/40 and 1/30

Mathematics

1 answer:

masya89 [10]2 years ago

6 0

The least common denominator is 120

21/120 and 4/120

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sammy [17]

Answer:

Step-by-step explanation:

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2 years ago

Multiply (4+I)(1-5i)

Svetllana [295]

The rule to remember for this problem is: i^2 = -1
(4 + i)(1 - 5i)
4 - 20i + i - 5i^2
4 - 19i + 5
9 - 19i

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3 years ago

The scores for a certain test of intelligence are normally distributed with mean 85 and standard deviation 11. Find the 90th per

jonny [76]

Answer:

99.1 is the 90th percentile of these scores.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 85

Standard Deviation, σ = 11

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

Formula:

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

We have to find the value of x such that the probability is 0.90

$P( X < x) = P( z < \displaystyle\frac{x - 85}{11})=0.90$

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

$P(z \leq 1.282) = 0.90$

Putting values, we get,

$\displaystyle\frac{x - 85}{11} = 1.282\\\\x = 99.1$

Thus, 99.1 is the 90th percentile of these scores.

5 0

3 years ago

What is the surface area of a box with the dimensions of length 4cm, width 3cm, and height 5cm? Only type the number - no units.

stich3 [128]

Answer:

heyy

Step-by-step explanation:

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3 years ago

Question Progress

kozerog [31]

5 - 2 times 38 is -71.
Have a nice day

7 0

3 years ago

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