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3 years ago

F(x)=[3x-4] absolute value

Mathematics

2 answers:

VLD [36.1K]3 years ago

4 0

I think it might be X > 1

Alinara [238K]3 years ago

3 0

Answer:

x≥1

Step-by-step explanation:

x has to be bigger than 1 or equal to 1.

Because if it is something smaller than that, then the answer becomes negative, which is not allowed. Absolute value always give positive answers!

Hope this helps!

Mark brainliest if you think I helped! Would really appreciate!

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A psychology professor assigns letter grades on a test according to the following scheme. A: Top 11% of scores B: Scores below t

GaryK [48]

Answer: the minimum score required for an A grade is 91

Step-by-step explanation:

Since the scores on the test are normally distributed, we would apply the formula for normal distribution which is expressed as

z = (x - µ)/σ

Where

x = scores on the test.

µ = mean score

σ = standard deviation

From the information given,

µ = 81.8

σ = 7.8

The probability value for the scores in the top 11% would be (1 - 11/100) = (1 - 0.11) = 0.89

Looking at the normal distribution table, the z score corresponding to the probability value is 1.23

Therefore,

1.23 = (x - 81.8)/7.8

Cross multiplying by 114, it becomes

1.23 × 7.8 = x - 81.8

9.594 = x - 81.8

x = 9.594 + 81.8

x = 91 rounded to the nearest whole number.

7 0

3 years ago

Simplify the expression with nested parentheses.<br> 430+ 26+6−33

morpeh [17]

Answer:

using bodmas.

6-33=-27.

430+26=456.

456-27=429

8 0

2 years ago

During a school food drive, the

Dafna11 [192]

428 = c + 62 I think this is right I’m not so confident

8 0

3 years ago

Questions 2-7 will all be in regards to this data set:Observation X Y1 20 302 23 353 28 404 26 385 24 376 32 457 35 508 24 349 3

Tomtit [17]

Answer:

r =0.4437

Step-by-step explanation:

We have the follwoing dataset:

X: 20,23,53,4,24,32,35,24,31,23

Y: 30,35,40,38,37,45,50,34,42,32

n=10

The correlation coefficient is a "statistical measure that calculates the strength of the relationship between the relative movements of two variables". It's denoted by r and its always between -1 and 1.

And in order to calculate the correlation coefficient we can use this formula:

$r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}$

For our case we have this:

n=10 $\sum x = 269, \sum y = 383, \sum xy = 10609, \sum x^2 =8645, \sum y^2 =15007$

Th excel figure attached shows the calculations for each sum.

$r=\frac{10(10609)-(269)(383)}{\sqrt{[10(8645) -(269)^2][10(15007) -(383)^2]}}=0.4437$

So then the correlation coefficient would be r =0.4437

3 0

3 years ago

What is the explicit tule for this sequence?

Oksi-84 [34.3K]

Answer:

an = 8n − 65 is the correct answer

6 0

2 years ago

F(x)=[3x-4] absolute value​

F(x)=[3x-4] absolute value