We want to simplify:
first we factorize
as
then multiply
by
to equalize the denominators of the first expression, and add the fractions.
simplify x+3:
a.
b.
steps already described
c.
x cannot be -1, nor -3 because the fractions with denominators (x+1) and (x+3) would not be defined.
The formula for the circumference of a circle 'pi x diameter' so you need to multiply the radius shown on the circle by 2 so 15 x 2 = 30 and then you multiply this by pi using the formula: pi x 30 = 94.25 to 2 decimal places. This is the final answer. The pi symbol is π can be found on an advanced calculator :) .
7
the median is 7 :)
i hope this helped