B.  4
Step-by-step explanation:
When you perform the multiplication, you get ...
 (x +c)(x +4) = x² + (c+4)x +4c = x² + 8x +4c
Then ...
 c + 4 = 8 . . . . coefficients of x must match
 c = 4 . . . . . matches choice B
answear:
a
step-by-step explanation: a
find the magnitude of the trig term
csc
(
x
)
−
1
by taking the absolute value of the coefficient.
find the lower bound of the range.
tap for more
y
=
2
find the upper bound of the range.
0
the range is
≤
or
≥
.
∞
,
]
∪
[
{
|
}
step-by-step explanation: