You answer should be 2. Do the Mass and volume. Equation which is Volume divide by mass equals 2 hope this help
Answer:

Step-by-step explanation:
From the question we are told that
February Heat
February Gas 
April Heat
April Gas 
Generally equation for heating degree-days X is mathematically given by



Generally the equation for gas bill Y is mathematically represented by

The equation representing the relationship between the gas bill (Y) and heating degree-days (X) is

Answer:
15
Step-by-step explanation:
-a -8b = -9 + 24 = 15
Answer:
40 marks was the pass marks of the subject.
Step-by-step explanation:
32.8 + 7.2 = 40 marks { basic addition theory based }