Alright so basically what you have to do here is realize that 130 miles is 2 hours, so if you divide by 2, you’ll have 65 miles in one hour ,, so 6mph, and if you divide again by two, you have 32.5 miles ,, therefore he travels 32.5 miles in 30 minutes
Answer:
SAS
Step-by-step explanation:
Hope I helped!!
Answer:
a is option c
b is 17.5
c is 9
Step-by-step explanation:
I do not know if all of these are right
The total worth of the 4 pounds and 8 ounces of box is $1800
<h3>Total cost</h3>
Weight of the boxes:
- 4 pounds
- 8 ounces
- Cost of each pound = $400
Convert ounces to pounds:
8 ounces to pounds = 0.5 pounds
Total cost of the boxes = 4 pounds (400) + 0.5 pounds (400)
= 1600 + 200
= $1,800
Learn more about ounces to pounds:
brainly.com/question/10618309
#SPJ1
Answer:
See the proof below.
Step-by-step explanation:
For this case we just need to apply properties of expected value. We know that the estimator is given by:
And we want to proof that 
So we can begin with this:
And we can distribute the expected value into the temrs like this:
And we know that the expected value for the estimator of the variance s is 
, or in other way 
so if we apply this property here we have:
And we know that 
so using this we can take common factor like this:
And then we see that the pooled variance is an unbiased estimator for the population variance when we have two population with the same variance.
