Question

A cookie jar starts off with 32 cookies in it, and
each day 2 cookies are eaten. After a certain
number of days, there are 14 cookies left in the jar.
Which of the following equations represents the
day, d, when there are 14 cookies in the jar?

Answer 1

Answer:

9 days

Step-by-step explanation:

32-2-2-2-2-2-2-2-2-2 = 14

Answer 2

Answer:

Step-by-step explanation:

Let C = # of cookies left in the jar; let d represent the number of days.

Then:

C(d) = 32 cookies - (2 cookies/day)(d) for d:  [0, 16]

If C(d) = 14, then 14 = 32 - 2d, or 2d = 32 - 14, or 2d = 18, or d = 9

There are 14 cookies left after 9 days.