1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lakkis [162]
3 years ago
10

PLz help i need help im helping my brother with his stuff becuase i owe him :(

Mathematics
2 answers:
Kruka [31]3 years ago
5 0

Answer:

48+30

Step-by-step explanation:

On the 33 they subtracted 3 so now its 30. Add the 3 to 45 and you get 48.

Aleks04 [339]3 years ago
5 0
48+ 30 is the answer
You might be interested in
To prove that ΔDEF ≅ ΔDGF by SSS, what additional information is needed?
FinnZ [79.3K]

Answer:

DE ≅ DG

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
I need help please?!!
Fiesta28 [93]

Answer:

-45

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Eremy works two jobs. He makes $8/hr working at a deli and $12/hr working for a landscaper. Let x represent the number of hours
bezimeni [28]

Answer:

A.) combinations of the hours he can work at the two jobs and earn at least $300

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Subtracting/adding mixed fractions
pishuonlain [190]
A)
= 3 2/4
= 3 1/2

b)
= 7 10/15 + 2 3/15
= 9 13/15
4 0
3 years ago
At a recent county fair, you observed that at one stand people's weight was forecasted, and were surprised by the accuracy (with
MatroZZZ [7]

Answer:

a)Slope: \hat \beta_1 =\frac{7625.9}{1248.9}=6.106

Intercept: \hat \beta_o = 157.955 -6.106 (69.686)=-267.548

b) r=\frac{7625.9}{\sqrt{[1248.9][94228.8]}}=0.657  

And the determination coeffecient is r^2 = 0.657^2 =0.432  

Step-by-step explanation:

Data given and definitions

The correlation coefficient is a "statistical measure that calculates the strength of the relationship between the relative movements of two variables". It's denoted by r and its always between -1 and 1.  

The sum of squares "is the sum of the square of variation, where variation is defined as the spread between each individual value and the grand mean"    

When we conduct a multiple regression we want to know about the relationship between several independent or predictor variables and a dependent or criterion variable.  

n=110, \sum x_i y_i = \sum (X-\bar X)(Y-\bar Y) =7625.9,\sum x^2_i=\sum (x-\bar x)^2 =1248.9 , sum y^2_i=\sum(y-\bar y)^2 =94228.8  

\sum Y_i =17375 , \sum X_i = 7665.5

Part a

The slope is given by this formula:

\hat \beta_1 =\frac{\sum (x-\bar x) (y-\bar y)}{\sum (x-\bar x )^2}

If we replace we got:

\hat \beta_1 =\frac{7625.9}{1248.9}=6.106

We can find the intercept with the following formula

\hat \beta_o = \bar y -\hat \beta_1 \bar x

We can find the average for x and y like this:

\bar X=7665.5/110 =69.686, \bar y= 17375/110=157.955

And replacing we got:

\hat \beta_o = 157.955 -6.106 (69.686)=-267.548

Part b

In order to calculate the correlation coefficient we can use this formula:  

r=\frac{\sum (x-\bar x)(y-\bar y) }{\sqrt{[\sum (x-\bar x)^2][\sum(y-\bar y)^2]}}  

For our case we have this:  

n=110, \sum x_i y_i = \sum (X-\bar X)(Y-\bar Y) =7625.9,\sum x^2_i=\sum (x-\bar x)^2 =1248.9 , sum y^2_i=\sum(y-\bar y)^2 =94228.8  

So we can find the correlation coefficient replacing like this:

r=\frac{7625.9}{\sqrt{[1248.9][94228.8]}}=0.657  

And the determination coeffecient is r^2 = 0.657^2 =0.432  

6 0
3 years ago
Other questions:
  • Ivana printer prints 40 pages in 5 minutes.How many pages will the printer print in 8 minutes
    5·2 answers
  • ​a/an ______ angle measures less than 90degrees°​, ​a/an ______ angle measures 90degrees°​, ​a/an ______ angle measures more tha
    7·1 answer
  • What is the value of log4_16?​
    15·1 answer
  • How to round 8,230 to the nearest thousand
    13·2 answers
  • Here is a triangle with some triangles inside it.​
    10·1 answer
  • An item is priced at $14.55. If the sales tax is 6%, what does the item cost including sales tax?
    8·1 answer
  • How do I find the slope of a line that passes through?​
    15·1 answer
  • Which of the following is an example of mass wasting?
    8·2 answers
  • I need help with this question! Thank you :)
    8·2 answers
  • 1. It is a way of comparing two or more quantities having the same units. * 1 point O a. decimal O b. addends . O c. ratio O d.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!