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VARVARA [1.3K]
3 years ago
13

Helppppp pls and ty lol

Mathematics
1 answer:
tensa zangetsu [6.8K]3 years ago
8 0
I’m sorry what do you help with?
You might be interested in
Find the solution(s) to (x- 3) = 49. Check all that apply.
natima [27]

Answer:

B.x= -4 and E. x= 10 are the answers

4 0
3 years ago
Rewrite the following expression without using absolute value. I3-√4I
nataly862011 [7]

Hey there!

\mid 3-\sqrt{4} \mid

Square root of four is positive or negative 2.

\mid 3 - \pm 2 \mid

So we have:

\mid 3-2 \mid  or  \mid 3+2 \mid

Add or subtract.

\mid 1 \mid  or  \mid 5 \mid

Simplify the absolute value bars.

1 or 5

Hope this helps!

7 0
3 years ago
Read 2 more answers
Dan earns £7.90 per hour how much will he earn for 6 hours
Anna [14]

Answer:

£47.4

Step-by-step explanation:

£7.90 per hour

6 hours = £7.90 x 6 = £47.4

<em><u>Ace Carlos</u></em>

5 0
3 years ago
Use the given data to find a regression line that best fits the price-demand data for price p in dollars as a function of the de
Rufina [12.5K]

Answer:

m=-\frac{7600}{8250}=-0.921

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

\bar x= \frac{\sum x_i}{n}=\frac{550}{10}=55

\bar y= \frac{\sum y_i}{n}=\frac{1042}{10}=104.2

And we can find the intercept using this:

b=\bar y -m \bar x=104.2-(-0.921*55)=104.707

So the line would be given by:

y=-0.921 x +104.707

Step-by-step explanation:

For this case we have the following data given:

Demand (x): 10,20,30,40,50,60,70,80,90,100

Price (y): 141 , 133,126, 128,113,97, 90, 82,79,53

We want to construct a linear model like this:

y = mx +b

For this case we need to calculate the slope with 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}

So we can find the sums like this:

\sum_{i=1}^n x_i =550

\sum_{i=1}^n y_i =1042

\sum_{i=1}^n x^2_i =38500

\sum_{i=1}^n y^2_i =115882

\sum_{i=1}^n x_i y_i =49710

With these we can find the sums:

S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}=38500-\frac{550^2}{10}=8250

S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}=49710-\frac{550*1042}{10}=-7600

And the slope would be:

m=-\frac{7600}{8250}=-0.921

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

\bar x= \frac{\sum x_i}{n}=\frac{550}{10}=55

\bar y= \frac{\sum y_i}{n}=\frac{1042}{10}=104.2

And we can find the intercept using this:

b=\bar y -m \bar x=104.2-(-0.921*55)=104.707

So the line would be given by:

p(x)=-0.921 x +104.707

4 0
3 years ago
Just need question # 12. Thanks
Natalka [10]

There are two lines from the center of the circle labeled 5.

The lines at 90 degrees from the 5 are chords.  Because both lines are the same distance from the center they are the same length.

The one on the top is labeled as 9, so the line on the bottom is also 9 units long.

X is half the length, so would b 9 /2 = 4.5 units long.

7 0
3 years ago
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