C) Undefined
formula: y-y/x-x
9--5= 9+5=14
-5--5= -5+5= 0
14/0
you can't divide by 0 so it's undefined
If we call the area A, then

if we call the perimeter P, then



subtracting 14 gives

subtracting 2x gives

dividing by 5 gives

or
Answer:
x = 3
Step-by-step explanation:
The equation is,
16 = 5x+1
Subtract 1 from both sides,
16-1 = 5x
15 = 5x
Divide by 5,
x = 3
Answer:
19/2
Step-by-step explanation :
U divide the numerator and the denominator by the same number which is 3
57 divided by 3 = 19
6 divid by 3 = 2
So the answer is 19/2