Answer:
Let's calculate the total cost of the gifts for one birthday party first:
Sticker mosaic craft set: $11
Journal: $2
Pen: $1
Total for one set of gifts: $11 + $2 + $1 = $14
Now, since Hailey has to buy gifts for three birthday parties, we need to multiply this total by 3:
Total for three sets of gifts: $14 * 3 = $42
Hailey thinks she can buy the three gifts for less than $40, but the total cost for three sets of gifts is $42. Therefore, Hailey is incorrect; she cannot buy the gifts for less than $40.
Explanation: