Answer: First Option : Sₙ= n/2(a₁ + aₙ)
Step-by-step explanation:
The nth partial sum of an arithmetic sequence or the sum of the first n terms of the arithmetic series can be defined as the sum of a finite number of term in an arithmetic sequence.
It is calculated using the formula:
Sₙ= n/2(a₁ + aₙ)
Where :
a₁ = First term
aₙ = last term
n = number of terms
Answer is in the attached file...
Answer:
Distribution 4, mean is 20 and standard deviation is 3.2
Step-by-step explanation:
The standard deviation tells us on average how far each of our data values is from the mean. A standard deviation that is larger than the others will mean a distribution that is more spread out than the others; 3.2 is the largest standard deviation, so Distribution 4 has the greatest spread.
25% = 25/100 = 0.25
9*0.25 = 2.25.
You save $2.25 with the discount.
Answer: 60.5
Step-by-step explanation:
Since you’re solving for y, you want to get it by itself to get a clean reading answer of y= blank.
So in 6y=363 you would want get rid of that 6 from the y, do you would divide both sides by 6.
6y/6 = 363/6
And then you’d get
y=60.5 once you finish dividing.
