It's about 3 (3 13/33) to be exact
Both of the Billy’s parents (calling the parent billy) being tall is a recessive trait therefore both Billy’s parents has to have at least one recessive trait to make a tall child. Billy’s genotype would be way tt (aka recessive, recessive).
Answer:
3=111
Step-by-step explanation:
It’s (-8z^2 +8x +4y -2z)
Hope it helps