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Elza [17]
3 years ago
5

3x+4y=17 and slove for y​

Mathematics
1 answer:
Llana [10]3 years ago
6 0

Answer:

y=17/4 - 3x/4

Step-by-step explanation:

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A financial talk show host claims to have a 55.3 % success rate in his investment recommendations. You collect some data over th
baherus [9]

Answer:

There is a 25.52% probability of observating 4 our fewer succesful recommendations.

Step-by-step explanation:

For each recommendation, there are only two possible outcomes. Either it was a success, or it was a failure. So we use the binomial probability distribution to solve this problem.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

In this problem we have that:

p = 0.553, n = 10

If the claim is correct and the performance of recommendations is independent, what is the probability that you would have observed 4 or fewer successful:

This is

P(X \leq 4) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) + P(X = 4)

In which

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 0) = C_{10,0}.(0.553)^{0}.(0.447)^{10} = 0.0003

P(X = 1) = C_{10,1}.(0.553)^{1}.(0.447)^{9} = 0.0039

P(X = 2) = C_{10,2}.(0.553)^{2}.(0.447)^{8} = 0.0219

P(X = 3) = C_{10,3}.(0.553)^{3}.(0.447)^{7} = 0.0724

P(X = 4) = C_{10,4}.(0.553)^{4}.(0.447)^{6} = 0.1567

P(X \leq 4) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) + P(X = 4) = 0.0003 + 0.0039 + 0.0219 + 0.0724 + 0.1567 = 0.2552

There is a 25.52% probability of observating 4 our fewer succesful recommendations.

3 0
2 years ago
If the 100th term of an arithmetic sequence is 710, and its common difference is 7, then
bearhunter [10]
If a is the first term then a+99*7=710, a+693=710, a=710-693=17. The first term is 17.
8 0
3 years ago
How to you find surface area of a prism
KonstantinChe [14]
You 2l x 2w and blah blah blah blah blah blah blah blah
5 0
3 years ago
jennifer started working at her job earning $6.25 per hour. every 6 months, she gets a 3.25% raise. if jennifer has worked at th
den301095 [7]

Answer:

Step-by-step explanation:

She'll make a total of 0.20 cents more so she'll make 6.45 per hour

thank you

And may I please be rewarded with brainliest I only need one more to go up in ranking

5 0
3 years ago
Which expression shows 2 more than 1/5 times the sum of 7/12 and 3?
xenn [34]
The answer is D. 2+1/5×(7/12+3)
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