Answer:
31.5
Step-by-step explanation:
We can add the areas together
We have a rectangle and a triangle
The area of the rectangle is
A = lw
= 7*3
= 21
The area of the triangle is
A = 1/2 bh
= 1/2 (7)*3
= 21/2
= 10.5
Add them together
A = 21 + 10.5
=31.5
Answer:
To make f continuous at
,
should be defined 
Step-by-step explanation:
A function, let say
, is defined at
is continuous at 
If the limit of
as
approaches
is equal to the value of
at
.
Mathematically it is written as:
if

then
is continuous at
.
So from the above definition, we conclude that:
To make f continuous at
,
should be defined 
i.e.
if

then
is continuous at
.
Answer:

Step-by-step explanation:
see the attached figure to better understand the problem
step 1
Find the length side KJ
In the right triangle JKM
Applying the Pythagoras Theorem

we have


substitute



simplify

step 2
Find the value of cosine of angle MJK in the right triangle JKM

substitute the values

simplify
-----> equation A
step 3
Find the value of cosine of angle MJK in the right triangle JKL

we have

----> remember equation A
substitute the values

Simplify
