Answer:
x>-7
Step-by-step explanation:
Using the Central Limit Theorem, the standard error of the distribution of differences in sample means is of 1.97.
<h3>What is the standard error for each sample?</h3>
According to the Central Limit Theorem, it is given by the <u>standard deviation of the sample divided by the square root of the sample size</u>, hence:
<h3>What is the square root of the distribution of differences?</h3>
It is given by the <u>square root of the sum of the standard errors of each sample squared,</u> hence:
s = sqrt(1.1² + 1.63²) = 1.97.
More can be learned about the Central Limit Theorem at brainly.com/question/16695444
#SPJ1
I'm pretty sure the answer is D. 6x + 5. I hope this helps.
Step-by-step explanation:
1/(seca-tana) - 1/cosa=1/cosa -1/(seca+tana)
There are many ways to solve this, let's take a look at a simple one
1/(seca-tana) + 1/(seca+tana) =1/cosa + 1/cosa
((seca-tana)+(seca+tana))/(sec^2a-tan^2a)=2/cosa
(seca-tana+seca+tana)/1=2*1/cosa
2seca=2seca
