30%of 68 = 30/100*68= 3*68/10=204/10=20.4
Answer: what what! Confused
Step-by-step explanation:
Answer:
12.4523 kg
Step-by-step explanation:
The variance is found by averaging the square of the deviance (how far a number is from the mean) of each number.
Since we found the average of the deviance, all we have to do now is square that, and divide by the number of subjects.
11.1590² = 124.5232 --> 124.5232/10 = 12.4523 kg
So the formula for an arithmetic sequence (where you're adding or subtracting by the same number each time) is = + d(n - 1)
In this equation:
is the nth term
is the first term
d is the common difference (the number you're adding or subtracting each time)
n is the number of the term (e.g. 1st term, 2nd term, 3rd term etc)
So we're given that = -27, and we can find that d = 15 (because we add 15 each term). We just plug these values into the equation to get...
= -27 + 15 (n - 1)
It looks like that's your answer, D. But if you needed to solve it out further, you could:
We can use the distributive property...
= -27 + 15n - 15
Then combine like terms...
= 15n - 42
Hope that helps! Feel free to message me if you need clarification