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
Tema [17]
3 years ago
15

(3 pt)

Mathematics
1 answer:
AlladinOne [14]3 years ago
7 0

The correct answer is B

You might be interested in
Geometry: CC 2015 > Chapter 2: Chapter 2 Test >
tankabanditka [31]

Answer:

The area of ABCF is 2 and 2 × AB = 4

The statement proves that the conjecture is false

Step-by-step explanation:

A conjecture is a proposition or conclusion that is presumed to be true or correct but which is based on incomplete details or information

Given the length of the sides of rectangle ABDE, we have;

Length AB = 2 units

Length DE = 2 units

The area of ABDE = 2 × 2 = 4 unit²

Therefore, the area of the rectangle ABDE is equal to 2 × the length of either AB or DE

However, the are of rectangle ABCF = 2 × 1 = 2 unit²

While the area of rectangle 2 × the length of side AB = 2 × 2 = 4 unit², which is not equal to the number of square units in the area of the rectangle.

Therefore;

The area of ABCF is 2 and 2 × AB = 4

The statement (above) proves that the conjecture is false.

7 0
3 years ago
It takes Austin 8 hours longer than Elliott to construct a wooden chair in shop class. When the classmates work together, they c
Scorpion4ik [409]

Answer:

c

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
What is 45% of 16? <br> Please show your work
Bezzdna [24]
7.2

Work: 45% x 16=
(45/100) x 16=
(45x16) / 100=
720/100=
7.2
5 0
3 years ago
Read 2 more answers
Assume you have noted the following prices for books and the number of pages that each book contains. Book Pages (x) Price (y) A
belka [17]

Answer:

a) y=0.00991 x +1.042  

b) r^2 = 0.7503^2 = 0.563

c) r=\frac{7(30095)-(4210)(49)}{\sqrt{[7(2595100) -(4210)^2][7(354) -(49)^2]}}=0.7503  

Step-by-step explanation:

Data given

x: 500, 700, 750, 590 , 540, 650, 480

y: 7.00, 7.50 , 9.00, 6.5, 7.50 , 7.0, 4.50

Part a

We want to create a linear model like this :

y = mx +b

Wehre

m=\frac{S_{xy}}{S_{xx}}  

And:  

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}=2595100-\frac{4210^2}{7}=63085.714  

S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i){n}}=30095-\frac{4210*49}{7}=625  

And the slope would be:  

m=\frac{625}{63085.714}=0.00991  

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

\bar x= \frac{\sum x_i}{n}=\frac{4210}{7}=601.429  

\bar y= \frac{\sum y_i}{n}=\frac{49}{7}=7  

And we can find the intercept using this:  

b=\bar y -m \bar x=7-(0.00991*601.429)=1.042  

And the line would be:

y=0.00991 x +1.042  

Part b

The correlation coefficient is given by:

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

For our case we have this:

n=7 \sum x = 4210, \sum y = 49, \sum xy = 30095, \sum x^2 =2595100, \sum y^2 =354  

r=\frac{7(30095)-(4210)(49)}{\sqrt{[7(2595100) -(4210)^2][7(354) -(49)^2]}}=0.7503  

The determination coefficient is given by:

r^2 = 0.7503^2 = 0.563

Part c

r=\frac{7(30095)-(4210)(49)}{\sqrt{[7(2595100) -(4210)^2][7(354) -(49)^2]}}=0.7503  

4 0
3 years ago
How many students got eight or more answers correct?
slamgirl [31]

Answer:

9

Step-by-step explanation:

You have to count the number of dots there are after the number 8. (This includes the dotes above 8.)

7 0
3 years ago
Read 2 more answers
Other questions:
  • Selma wants to know if seventh grade students prefer to do their math homework in silence or with background music. She polled
    11·1 answer
  • In One day a movie store rented out 15 comedies. If the ratio of comedies rented to action movies rented 3:1 how many action mov
    12·1 answer
  • Every possible cross section of a three-dimensional figure is a circle. What is the figure?
    5·1 answer
  • Trisha and Felix are renting a car while on vacation. The rental car company charges $25.00 per day, plus $0.50 for each mile th
    8·1 answer
  • Of what numbers does the binary system consist of
    15·2 answers
  • Can my two questions be answered? Here are the ingredients for making fish pie for 6 people. 180 g flour 240 g flour 4 eggs 180
    9·1 answer
  • Pls, can you help me whit this? thx♡
    8·1 answer
  • Plz help me I am <br> Stuck
    6·1 answer
  • What is the volume of the pyramid in the diagram?
    5·1 answer
  • There are 135 people in a sport centre.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!