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3 years ago

How to understand arrow way math

Mathematics

1 answer:

mars1129 [50]3 years ago

7 0

It's depend on what it is if its an timeline then weather why number is depending on

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Let f be a function such that f(x)=5x-3 is defined by the domain 2≤x≤5. The range of the function is

sasho [114]

Answer:

1. Multiply like the - isn't there

2.add it

3. Idk I just out something XD

Step-by-step explanation:

8 0

2 years ago

Almost all companies utilize some type of year-end performance review for their employees. Human Resource (HR) at a university's

balu736 [363]

Answer:

The Answer is 76.

Step-by-step explanation:

Given the normal distribution " 10% of employees (rated) exemplary, 20% distinguished, 40% competent, 20% marginal, and 10% unacceptable'', we can see that exemplary employees are top 10% rated employees.

We have the formula for normal distribution:

z=(X-M)÷σ

where z is the minimum z-score for top 10% employee, X is the minimum score for top 10% employee, M is the mean of the score distribution, σ is the standard deviation of the score distribution.

The z-score we are looking for is the value "a" that separates the highest 10% from the lowest 90% i.e. P(z≤a)=0.90

If we look at z-table, corresponding value for a is 1.28155

We can now put the values in the formula:

1.28155= $\frac{X-50}{20}$

So X=(1.28155×20)+50=75.631

Therefore minimum score for exemplary employee is 76.

3 0

2 years ago

I WILL AWARD BRAINLIEST!! PLEASE HELP!!

Sergeeva-Olga [200]

$xy \: = product \\ xn \times 2y = 2nxy \\$

the product will increase by 2n

6 0

3 years ago

The mean number of points in 1977 was 1189 points with standard deviation of 397 points. With a roughly normal distribution, wha

KonstantinChe [14]

Answer:

C. 95%

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

Approximately 68% of the measures are within 1 standard deviation of the mean.

Approximately 95% of the measures are within 2 standard deviations of the mean.

Approximately 99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean of 1189 points, standard deviation of 397 points.

Percentage between 395 and 1983 points?

395 = 1189 - 2*397

1983 = 1189 + 2*397

So within 2 standard deviations of the mean, which by the Empirical Rule is approximately 95%, and the answer is option C.

5 0

3 years ago

Multiply. Express your answer in simplest form (x^2 -4x+3)(-3x^2+7x-1)

mafiozo [28]

Here the answer. -3x^4 +19x^3-38x^2+25x-3

3 0

3 years ago