Answer:
x=-12 and -3
Step-by-step explanation:
The quadratic formula is
.
It is important because while some quadratics are factorable and can be solved not all are. The formula will solve all quadratic equations and can also give both real and imaginary solutions. We will substitute a=1, b=15 and c=36.
We will now simplify and solve.
x=-12 and x=-3
The 8 is in the 80,000 or eighty thousands
Your mean for this problem would be 4.7 and you variance would be 2.5
Answer:
(n-1)/2n
Step-by-step explanation:
½(1 - 1/n)
(n-1)/2n