The complete question in the attached figure
we know that
perimeter=24 ft
[the perimeter of a rectangle]=2*8+2*x-----------> 16+2x
24=16+2x-------> 2x=24-16----------> 2x=8----------> x=4 ft
the answer is
the option C) x=4 ft
A main characteristic of a function is that each output has exactly one input. This means that for the X value there can’t be any repeats, making the answer C.
Cos(60) = cos(90 - 30) = sin(30) = 1/2
This should be what you want.
Well what +8 will be -11.
Let’s take this as positives.
8+11=19
Sooo
-19+8=-11
C=-19