algebra
posted by Frustrated .
The function H described by H(x)=2.75x + 71.48 can be used to predict the height, in centimeters, of a woman whose humerus (the bone from the elbow to the shoulder) is x cm long.
Predict the height of a woman whose humerus is 38 cm long?

This is just "plug 'n chug". You are given the value substitute it into the equation and use a calculator.