Answer:
X=65°
Step-by-step explanation:
Both angles combined is a right angle as indicated by the small square drawn on it, a right angle is always 90° therefore
(x-15°)+40°=90°
combine like terms
x+25°=90°
subtract 25° from each side
x=65°
For the second one, what is the number before the x?
Answer x=-14.
Step-by-step explanation:
4+x/7
4+ -14/7
4+-2
2
has two points of discontinuity at
, where
.
We have

so as long as
, we can cancel
and be left with
. Then as
, we have

The limit exists, so the discontinuity at -1 is removable (so definitely not C or D).
Meanwhile,

does not exist, so the discontinuity at 1 is non-removable, making A the correct answer.