A sample of n=8 scores has a mean of m=12. What is the value of ∑x for this sample
Answer: We are given the mean of 8 scores is 12.
We are required to find the sum of these 8 observation's, 
We know that:
We are given:
Hence, sum of 8 observation's, 
Answer:
£69.11
Step-by-step explanation:
Find out 18% of 58.48 then add the answer to 58.48 itself
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3x^2=375
x^2=125
x=11.18
c or d, they say the same thing
Answer:
system A because we can substitute y in 2nd equation into the first equation
also system B because we can substitute x in the 1st equation into 2nd equation
Two negatives equals a positive:
Add the numerators and keep the denominator:
