Answer:
10 m/h
Step-by-step explanation:
By finding the slope of the line you find how fast he is traveling
-4.5 rad = -4.5 x 180 / pi = -257.83°
The general equation of a line is y = mx + b
m is given as 1/2, so we have:

Plugging in the given values of x and y, we get:
-2 = 0 + b
Therefore b = -2, and the answer is:
Answer:
The idea is to transform the expression by multiplying
with its conjugate,
.
Step-by-step explanation:
For any real number
and
,
.
The factor
is irrational. However, when multiplied with its square root conjugate
, the product would become rational:
.
The idea is to multiply
by
so as to make it easier to take the limit.
Since
, multiplying the expression by this fraction would not change the value of the original expression.
.
The order of
in both the numerator and the denominator are now both
. Hence, dividing both the numerator and the denominator by
(same as
) would ensure that all but the constant terms would approach
under this limit:
.
By continuity:
.