Question

A bear cub weighs 10 pounds at birth, and it gains an average of 5 pounds every month.

Answer 1

Just keep adding 5 for each month.

Explanation:

10 + 5 = 15

15 is first month

20 second

25 third

30 fourth

35 fifth

40 six

etc.

Equation :

10 + (5m)

m = number of months that have passed by.