PLZ HELP,, WILL BE MUCH APPRECIATED!
Robert and Susan's mother is 160cm tall.

Their father is 180cm tall.

The formula to calculate a boy's predicted height is:

0.4 (x + y) + 42

The formula to calculate a girl's predicted height is:

0.4 (x + y) + 29

The value x is the father's height in cm

The value y is the mother's height in cm

Calculate the predicted height of Robert when he is an adult. Be sure to include the correct unit of measurement.