Question

There are 5 cookies in each bag, and there are 20 cookies in the jar. The table shows how the number of cookies, c, depends on the number of bags, b. Choose the equation which represents the rule.

b c
4 40
5 45
6 50
7 55

A) c = 5b + 5
B) c = 20 − 5b
C) c = 5b − 20
D) c = 5b + 20

Answer 1

the answer is d) c=5b+20
since each bag has 5 cookies and the jar has 20 cookies, you would multiply the number of bags by 5 and then add 20 for the jar

Answer 2

D.
`c=5b+20`

Explanation:

Let the number of bags = b and total number of cookies = c.

We have that there are 5 cookies in a bag.

Also from the table, we see that,

The number of cookies are increasing by 5 per bag.

Then, number of cookies in 'b' bags =
`5b`

Also, there are 20 cookies in a jar.

Then, we have that,

The total number of cookies = Number of cookies in 'b' bags + Number of cookies in a jar

i.e.
`c=5b+20`

So, option D represents the rule.