The expression given is

The sum of the expression will be,

The sum will be
Answer:

Step-by-step explanation:
see the attached figure with letters to better understand the problem
we know that
In the right triangle ABD

In the right triangle BCD

remember that
m< BAD=m<CBD
therefore

equate the equations



The answer would be -21.6
Answer:
8 1
/2
For this we need to determine what
2
/3 of 12 3/4 is, so we multiply the fractions together.