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
Gnoma [55]
2 years ago
6

Which statement is true?

Mathematics
2 answers:
Amiraneli [1.4K]2 years ago
8 0
All squares are rectangles, as squares are a subset. 2 is false because rectangles are a subset. 3 is false because not all parallelograms have right angles. 4 is false (look at first sentence in answer.)



ra1l [238]2 years ago
3 0
The correct answer is:  [A]:  "All squares are rectangles."
______________________________________________________
You might be interested in
the measure of one side of a square is (s + 3) inches long. which pair of expressions both represent the perimeter of this squar
Akimi4 [234]
An expression could be 4(s+3). Hope it helps! :)
4 0
2 years ago
Read 2 more answers
What does the product (-5-2i)(3+7i) equal
Marina CMI [18]
This in what I got:
(-7i)(10i)
-70i
8 0
3 years ago
The answer to this problem
IrinaK [193]

Answer:

Which question are you needing help with?

Step-by-step explanation:

4 0
2 years ago
If 23,600,000 is written as 2.36 x 10" what is the value of n?
Dafna11 [192]

Step-by-step explanation:

there are 7 decimal places from between 2 and 3 to the very end. so the answer is 7

5 0
2 years ago
Read 2 more answers
Polymer composite materials have gained popularity because they have high strength to weight ratios and are relatively easy and
Brums [2.3K]

Answer:

t=\frac{51.6-48}{\frac{1.1}{\sqrt{10}}}=10.349      

p_v =P(t_9>10.349)=1.34x10^{-6}  

If we compare the p value and the significance level given for example \alpha=0.05 we see that p_v so we can conclude that we reject the null hypothesis, and the the actual mean is significantly higher than 48 MPa at 5% of significance.

Step-by-step explanation:

1) Data given and notation      

\bar X=51.6 represent the sample mean

s=1.1 represent the standard deviation for the sample      

n=10 sample size      

\mu_o =48 represent the value that we want to test    

\alpha=0.05 represent the significance level for the hypothesis test.    

t would represent the statistic (variable of interest)      

p_v represent the p value for the test (variable of interest)  

State the null and alternative hypotheses.      

We need to conduct a hypothesis in order to determine if the mean score is higher than 48, the system of hypothesis would be:      

Null hypothesis:\mu \geq 48      

Alternative hypothesis:\mu > 48      

We don't know the population deviation, so for this case is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:      

t=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}} (1)      

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

Calculate the statistic      

We can replace in formula (1) the info given like this:      

t=\frac{51.6-48}{\frac{1.1}{\sqrt{10}}}=10.349      

Calculate the P-value      

First we find the degrees of freedom:

df=n-1=10-1=9

Since is a one-side upper test the p value would be:      

p_v =P(t_9>10.349)=1.34x10^{-6}  

Conclusion      

If we compare the p value and the significance level given for example \alpha=0.05 we see that p_v so we can conclude that we reject the null hypothesis, and the the actual mean is significantly higher than 48 MPa at 5% of significance.        

5 0
3 years ago
Other questions:
  • You borrow 1180 you have paid 3/5 how much do you owe? how much did you pay?
    10·1 answer
  • The ___ of the ___ angle of an isosceles triangle is also the what of the base
    10·1 answer
  • Write an equation in point-slope form of the line having the given slope that contains the given point. m=5/6m=5/6m (30,12)(30,1
    5·1 answer
  • What is 2/3y for y = 18
    14·2 answers
  • What is the 2 plus 3 times 14
    8·1 answer
  • Jacob made a circle-shaped poster for his geometry class.
    7·1 answer
  • 12. One dekameter is equal to 1,000
    14·1 answer
  • So ive been trying to figure this out but i cant!
    5·2 answers
  • -5.8c +4.2 - 3.1 + 1.4c​
    5·1 answer
  • Which of the following is NOT an equation?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!