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irakobra [83]
2 years ago
12

Mathematics question

Mathematics
2 answers:
LekaFEV [45]2 years ago
6 0

Answer: a

adding the two polynomials will give you the answer a

morpeh [17]2 years ago
4 0

if you'll add the two polynomials above it appeared that the answer is letter B

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Let x be a random variable representing percentage change in neighborhood population in the past few years, and let y be a rando
Lisa [10]

Answer:

m=\frac{2506.833}{604.833}=4.1447  

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

\bar x= \frac{\sum x_i}{n}=\frac{77}{6}=12.833  

\bar y= \frac{\sum y_i}{n}=\frac{587}{6}=97.833  

And we can find the intercept using this:  

b=\bar y -m \bar x=97.833-(4.1447*12.833)=44.644  

So the line would be given by:  

y=4.1447 x +44.644  

Step-by-step explanation:

m=\frac{S_{xy}}{S_{xx}}  

Σx = 77, Σy = 587, Σx2 = 1593, Σy2 = 70,533, and Σxy = 10040.

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}  

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}=1593-\frac{77^2}{6}=604.833  

S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i){n}}=10040-\frac{77*587}{6}=2506.833  

And the slope would be:  

m=\frac{2506.833}{604.833}=4.1447  

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

\bar x= \frac{\sum x_i}{n}=\frac{77}{6}=12.833  

\bar y= \frac{\sum y_i}{n}=\frac{587}{6}=97.833  

And we can find the intercept using this:  

b=\bar y -m \bar x=97.833-(4.1447*12.833)=44.644  

So the line would be given by:  

y=4.1447 x +44.644  

5 0
3 years ago
kathleen bought 4 dresses that each cost the same amount and a pair of jeans that cost $40 the iteams she bought cost a total of
polet [3.4K]
The question seems incomplete, but if you are trying to figure out how much each dress costs, The answer would be $30.


To find the answer all you need to do is;
1. Subtract the price of the jeans ($40) From the total price.
160-40=120

2. Now we know the total price of the Dresses, and we also know she bought 4 of them, this means we can divide the total price ($120) of dresses, by the number (4) of dresses bought.
120/4 = 30.

So therefor, each dress costs $30 Dollars.

Hope this Helps! - Giz

7 0
3 years ago
Write 7/40 as a<br> percent. explain plz
Free_Kalibri [48]
17.5

This is because if you do the math: (7/40)*100 you get 17.5!

So divide 7 by 40 and then multiply it by 100!

7/40=0.175
0.175*100=17.5
8 0
2 years ago
HELP PLEASE WILL GIVE BRAINLIST
Juliette [100K]

Answer:

its 15.75 please give me brainliest hope I helped

3 0
2 years ago
Read 2 more answers
Can someone plz give me a right answer to this now?
yawa3891 [41]

Answer:

A,C,B..................

8 0
2 years ago
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