They are parallel when the slopes are the same
example:
y=2x+3
y=2x-5
We must follow order of operations rules (PEMDAS) here: exponentiation first, followed by multiplication and division, followed by addition and subtraction.
Thus, -2^2-3(-2)+1 becomes:
-[4] + 6 + 1 = 2 + 1 = 3 (answer)
if other experts state the same thing in their own paper or document.
H= ut -16 t^2
h = 144(2) - 16 (4)
= 288 - 64 = 224