Answer: The equation has a solution .
Step-by-step explanation:
Since we have given that

Squaring on both the sides, we get that,

Let 
So, our equation becomes,

So, 
Hence, the equation has a solution .
First step is Add 3 to both sides
hope it helps
Answer:
A score of 150.25 is necessary to reach the 75th percentile.
Step-by-step explanation:
Problems of normal distributions can be solved using the z-score formula.
In a set with mean
and standard deviation
, the zscore of a measure X is given by:

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
A set of test scores is normally distributed with a mean of 130 and a standard deviation of 30.
This means that 
What score is necessary to reach the 75th percentile?
This is X when Z has a pvalue of 0.75, so X when Z = 0.675.




A score of 150.25 is necessary to reach the 75th percentile.
This is a simple Pythagorean theorem, which says that c2 = a2 + b2
So let us just apply it here:
c^2 = 4^2 + 4^2
c^2 = 16 + 16
c^2 = 32
c = <span>√32
c = </span><span>√2*16
c = 4</span><span><span>√2
</span>The correct answer is c = 4</span><span>√2.</span>
Answer:
2(x^2)-1
Step-by-step explanation:
The square of a number is just the number squared. We don't know what the number is so I will just say it is x. So we have 2 times x^2. Then we have to minus 1 from that. So 2(x^2)-1.
Hope this helps! :D