Without solving explain why the equations do not have solutions
1 answer:
<h2>Examining the equation</h2>
We have 2 terms:
and
For the sum of these to equal a negative number, in this case -3, one of these terms would have to be negative.
<h2>So what's the problem?</h2>The function (square root of x) only returns positive values!
(See the attached image for a graph of )
Since neither of the terms can be negative, it can't be equal to -3. In other words, no matter what we put as , we can't solve the solution, so we say that the equation <em>does not have any solutions.</em>
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Step-by-step explanation:
put the value of y and get the value of x.then plot it in graph.(try to get non fractional values)
The confidence that the box you bought did not come from the factory is 90 %.
<u>Step-by-step explanation:</u>
Since we have given that
Population Mean weight (\mu)= 10 grams a piece
Standard deviation of the weight of a box = 3 grams
Number of mints = 10
We need to buy a box of mints that weighs 95 grams.
Sample mean is given by
x = grams
.
First we find out the standard error which is given by
= 0.94868
Since it is normal distribution, so, we will find z-score.
z = - 0.53
The area to the left of a z-score of -0.53 = 0.29805.
So, it may be 90% or 95 % confidence.
For 95% confidence level,
Similarly,
For 90% confidence level,
The value is much smaller than 0.05.
So, we will get 90% confidence and the critical value = 1.645
Margin of error is given by
(Standard deviation) (critical\ value) = 0.94868
1.645
=1.56
So, confidence interval will be
(10-1.56,10+1.56)
=(8.44,11.56)