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3 years ago

Find the domain of f(x) =√3x-1

Mathematics

1 answer:

maw [93]3 years ago

4 0

Answer:

The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.

( − ∞ , ∞ )

{x | x ∈ R }

Hope this helps I'm 80% sure this right.

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Use the given data to find the best predicted value of the response variable. Ten pairs of data yield requals0.003 and the regre

Arada [10]

Answer:

$\hat y=3(2) +2=8$

Step-by-step explanation:

Data given

r=0.003 represent the correlation coefficient

$bar y =5$ represent the sample mean for the y observations

Solution to the problem

We assume that they use least squares in order to find the best regression model. The slope is given by the following formula:

$m=\frac{S_{xy}}{S_{xx}}$

Where:

$S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}{n}$

$S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}$

And the slope on this case is:

$m=3$

Nowe we can find the means for x and y like this:

$\bar x= \frac{\sum x_i}{n}=5$

$\bar y= \frac{\sum y_i}{n}$

And we can find the intercept using this:

$b=\bar y -m \bar x=5-(3*\bar x)=2$

So the line would be given by:

$\hat y=3x +2$

And the best predicted value for x=2 would be:

$\hat y=3(2) +2=8$

3 0

3 years ago

Can someone help on all three

scZoUnD [109]

1. p=7.50+5.50v
p is the total price, v is the amount of visitors
For 6 visitors, it is $40.50

2. p=100+15x
p is the total price, x is the amount of dinner served
For 20 guests, it is $400

3.c=4.25+3.5p
c is the total cost, p is the amount of additional pecks you choose
For 3 pecks, it is $14.75

5 0

3 years ago

What is 7.1 -5 -3.27 =

Natalka [10]

Hey luv so we have
7.1-5-3.27
=2.1-3.27
=-1.17

:)

5 0

4 years ago

What type of number is π/2

sweet-ann [11.9K]

Answer:

Step-by-step explanation:

whole number No

integer No

rational : No, because pi is irrational.

irrational: YES. π/2 is the ratio of pi to 2, BUT pi is irrational.

7 0

3 years ago

Help me what’s the answer .

Mandarinka [93]

Answer:

x=3

Step-by-step explanation:

i helped my friend on this before but it was a word problem

8 0

3 years ago