Answer:
32.647
Step-by-step explanation:
friends. Keychains cost $2 each, and refrigerator magnets cost $1
each. Let x represent the number of keychains that Rosa bought,
and let y represent the number of refrigerator magnets.
Rosa bought 12 items and paid $18 more for the keychains than
for the refrigerator magnets.
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Answer:
Step-by-step explanation:
We assume you want to know how many of each item Rosa bought.
The problem information lets us write two equations:
x + y = 12
2x - y = 18
Adding the two equations, we get ...
3x = 30
x = 10 . . . . . divide by 3
y = 12 -x = 2 . . . find y
Rosa bought 10 keychains and 2 magnets.
What is true of Sanjay's attempt?
Responses
The kick is not successful. The ball is approximately 5 feet too low.
The kick is not successful. The ball is approximately 8 feet too low.
The kick is not successful. The ball is approximately 2 feet too low
The kick is good! The football clears the crossbar by approximately 5 feet.
In the above prompt involving a trajectory calculation, the correct option is: "The kick is not successful. The ball is approximately 5 feet too low." (Option A)
x component of trajectory = 73 cos 34 f/s
Now how long will it take to travel 49 yards (= 147 feet) ?
147 / (73 cos 34) = 2.43 seconds
Initial y component of trajectory = 73 sin 34 f/s = 40.82 f/s
but this velocity is acted upon by gravity
y = y0 + vot - 1/2 a t^2
y0 = 0
Now we need to know the y value at 2.43 seconds to see if it will clear the uprights.
y = 40.82 (2.43) - 1/2 (32.174)(2.43)2
= 4.2 Feet
Thus, it is correct to state that the "The kick is not successful. The ball is approximately 5 feet too low."
Learn more about Trajectory:
brainly.com/question/28164318
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Formula:
Interior + Interior=exterior
Step 1:
75 + 64 =x
Mark brainliest if helpful
2. Find the value of the Test Statistic.
3. Find the p-value
4. State your decision (Reject or not)
5. State your conclusion.
Answer:
Case I
Null hypothesis:
Alternative hypothesis:
Since is a two sided test the p value would given by:
If we compare the p value and the significance level given we see that so we can conclude that we have enough evidence to reject the null hypothesis.
We can say that at 5% of significance the true mean is different from 64.
Case II
Null hypothesis:
Alternative hypothesis:
The statistic not changes but the p value does and we have:
And we reject the null hypothesis on this case.
So we can conclude that the true mean is significantly higher than 64 at 5% of singnificance
Step-by-step explanation:
Data given and notation
represent the sample mean
represent the sample standard deviation
sample size
represent the value that we want to test
represent the significance level for the hypothesis test.
t would represent the statistic (variable of interest)
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 check if the population mean is different from 64 the system of hypothesis are :
Null hypothesis:
Alternative hypothesis:
Since we don't know the population deviation, is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:
(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:
P-value
We need to calculate the degrees of freedom first given by:
Since is a two sided test the p value would given by:
Conclusion
If we compare the p value and the significance level given we see that so we can conclude that we have enough evidence to reject the null hypothesis.
We can say that at 5% of significance the true mean is different from 64.
Now let's assume that we want to see if the mean is significantly higher than 64
Null hypothesis:
Alternative hypothesis:
The statistic not changes but the p value does and we have:
And we reject the null hypothesis on this case.
So we can conclude that the true mean is significantly higher than 64 at 5% of singnificance
Answer here
Answer:
X>-3
Step-by-step explanation:
Hope I helped
Do u want the steps ?
Answer: x > -3
Step-by-step explanation: -5(4x + 7) <25
-20x - 35 < 25
-20x -35 + 35 < 25 + 35
-20x/20 < 60/20
x > -3
Answer:
The probability that he or she is high-risk is 0.50
Step-by-step explanation:
P(Low risk) = 40% = 0.40
P( Moderate risk) = 40% = 0.40
P(High risk) = 20% = 0.20
P(At - fault accident | Low risk) = 0% = 0
P(At-fault accident | Moderate risk) = 10% = 0.10
P(At-fault accident | High risk) = 20% = 0.20
If a driver has an at-fault accident in the next year, what is the probability that he or she is high-risk. Hence, We need to calculate P( High risk | at-fault accident) = ?
Using Bayes' conditional probability theorem
P( High risk | at-fault accident) = ( P( High risk) * P(At-fault accident | High risk) ) / { P( Low risk) * P(At-fault accident | Low risk) +P( Moderate risk) * P(At-fault accident | Moderate risk) + P( High risk) * P(At-fault accident | High risk) }
P( High risk | at-fault accident)= (0.20 * 0.20) / ( 0.40 * 0 + 0.40 * 0.10 + 0.20 * 0.20 )
P( High risk | at-fault accident) = 0.04 / 0 + 0.04 + 0.04
P( High risk | at-fault accident) = 0.04 / 0.08
P( High risk | at-fault accident) = 0.50.
The probability that a driver is high-risk given that they had an at-fault accident can be found using Bayes' theorem. Given the probabilities provided in the question, the probability is approximately 0.3333 or 33.33%.
To find the probability that a driver is high-risk given that they had an at-fault accident, we can use Bayes' theorem. Let's define the events:
We are given the following probabilities:
Using Bayes' theorem, the probability of a driver being high-risk given that they had an at-fault accident is:
P(A|B) = (P(A) * P(B|A)) / (P(A) * P(B|A) + P(~A) * P(B|~A))
Substituting the given probabilities:
P(A|B) = (0.20 * 0.20) / (0.20 * 0.20 + 0.80 * 0.10) = 0.04 / (0.04 + 0.08) = 0.04 / 0.12 = 0.3333.
Therefore, the probability that a driver is high-risk given that they had an at-fault accident in the next year is approximately 0.3333 or 33.33%.
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