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
kondor19780726 [428]
3 years ago
6

How many planes of symmetry does a rectangular solid have? (the rectangular solid is not a cube?

Mathematics
1 answer:
Marianna [84]3 years ago
6 0
The answer is Answer:<span>  </span><span>6</span>
You might be interested in
I need to solve: -3(8x); x = 1/4. Using substitution ro find the value of expression
marishachu [46]
First, find the value of the expression within the parentheses, which is 8x. Since x=1/4, 8x=8/4 or 2. Next, multiply this value by -3. -3*2=-6
5 0
2 years ago
Suppose an item is originally
Sonbull [250]

Answer:$21.207 or $21.21

Step-by-step explanation:

You would take $24.95 *85% (that is how much you are going to pay) and the result is your answer

4 0
2 years ago
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
(2x^3+6x-1)+(3x^2-7x)
Neporo4naja [7]

Answer:

2x^3+2x-1

Step-by-step explanation:

3 0
3 years ago
What is 363.3 times 3456.2
KonstantinChe [14]

Answer: 1255637.46

Step-by-step explanation: asked my teacher

3 0
3 years ago
Other questions:
  • 247 + 794 is the same as<br> ? + 800
    12·2 answers
  • Help please, is it D?
    10·1 answer
  • #5) HELP WITH QUESTION!!!! MARKING BRAINLIEST!!! :)
    14·1 answer
  • Why is -a² is always negative (a ≠ 0) and why is (-a)² is always positive?
    6·1 answer
  • (6x to the second power +7x) + (5-2 to the second power +9x) please help
    8·1 answer
  • How do u make a table for 2x - y = 1
    12·1 answer
  • (Please help, Very desperate and I have a limited amount of time to get this done please hurry asap)
    15·1 answer
  • Hi can you guys help me with this :) ​
    10·2 answers
  • Find the surface area of the triangular prism
    12·1 answer
  • Kurt runs diagonally across a rectangular feild u get the resr just read the image
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!