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Morgarella [4.7K]
3 years ago
13

PLS HELP ME ASAP!!!!

Mathematics
1 answer:
elena55 [62]3 years ago
6 0

Answer:

2Pi/8

Step-by-step explanation:

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What is the slope of this? HELP PLS
Levart [38]

Answer:

4/5

Step-by-step explanation:

rise over run boi or gerl

7 0
3 years ago
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If you purchesd a $49.00 gift and you use a 20% off coupon how much do you spend
Nutka1998 [239]

Answer:

$39.20

Step-by-step explanation:

$49 * (1-.2) = $39.20

4 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
Please I need help thank you
masha68 [24]
A. (-) * (-) * (-) * (-) = positive
B. (-) * (-) * (-)  = negative
C. (-) * (-) = positive
D. (-) * (-) * (-)  = negative but times 0 = 0

so answer is 
B. product will be negative
7 0
3 years ago
How do you find a coordinate on a graph by using the gradient? I also have 1 other coordinate.
lakkis [162]
<span>choose any two points on the line.

draw a right-angled triangle with the line as hypotenuse.

use the scale on each axis to find the triangle's: vertical length. horizontal length.

work out the vertical length ÷ horizontal length.
<span>
the result is the gradient of the line.</span></span>
6 0
4 years ago
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