If d=8 what is the value of the expression 4 + d/12

Country carpets charges $22 per square yard for carpeting, and an additional installation fee of $100. city carpets charges $25 per square yard for the same carpeting, and an additional installation fee of $70

Asquare parking lot has 6,400 square meters what is the length in meters

Which of the following is correct interpretation of the expression -4+13