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4 years ago

HELP !! I really need to raise my grade. Please help me :( .

Mathematics

2 answers:

Serggg [28]4 years ago

7 0

The answer for number 2 would be C(3/2).

Hope this helps!

11Alexandr11 [23.1K]4 years ago

4 0

Answer:

The answer is C 3/2. Dilation is is done by 3/2.

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A dvd has an approximate radius of 2.4 inches what is the approximate area of the dvd

Trava [24]

Answer:

18.1 square inches

Step-by-step explanation:

The DVD has the shape of a circle, so its area is given by ...

A = πr² = π(2.4 in)² = 5.76π in² ≈ 18.1 in²

4 0

3 years ago

I need help!!!!!!!! I'm stumped.

juin [17]

Look it up on google its hard

5 0

3 years ago

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

Hi, so I was wondering if anyone knows the surface area of a cylinder if the diameter is 7.5? Thank you so much! :)

disa [49]

Answer:

206.17

Key(s):

$A = 2\pi \frac{d}{2} h + 2\pi \left(\frac{d}{2}\right)^2$

Substitute <em>d</em> for the actual diameter, 7.5, and <em>h</em> for the height, which is 5.

Step-by-step explanation:

$A = 2\cdot\pi \cdot\frac{7.5}{2} \cdot5 + 2\cdot\pi \cdot\left(\frac{7.5}{2}\right)^2$ ≈ 206.17(2 DP)

6 0

2 years ago

Has a checking account used three times used another twice how much will he be charged

stira [4]

It will be charged 5 times

7 0

3 years ago