Nrite the arithmetic series in summation notation.
3+ 6 + 9 + 12
3+6+ 9 + 12 = E O
n = 1

i got 142 as my answer

step-by-step explanation:

answer: .64

step-by-step explanation

set up the formula for standard deviation for this set of numbers, then simplify

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c

step-by-step explanation:

a'(12.5,11.25)

slope=(y1-y2)/(x1-x2)