Question

1) Andy buys k packets of crisps. Laura buys 2 more packets of crisps than Andy.

a. Write an expression for the total number of packets of crisps.

Answer 1

2k + 2

Explanation:

It's said that Andy buys k packets of crisps, meaning this is an unknown variable. Since Laura buys two MORE bags of crisps than Andy, her total number of chips will be k + 2. To find the TOTAL number of crisps between the two of them, you would have to add Andy's crisps, k, to Laura's crisps, k + 2. This will give you k + k + 2, which is just 2k +2.