Sarah plans to sell homemade birdhouses at the local craft fair. she spent $90 on new tools and estimates that she spends $6 in materials for each birdhouse. which rational function models the average cost per birdhouse, y, in dollars of building x birdhouses?

Step-by-step explanation:

Let x represents the number of birdhouses and y be the  average cost per birdhouse (in dollars).

Since she spends $6 in materials for each birdhouse.

Therefore, the total material cost for x birdhouses (in dollars)=

Also, She spent $90 on new tools.

Therefore, the total cost for building x bird house(in dollars) =

Now, The average cost per birdhouse =

Hence, the rational function models the average cost per birdhouse:

4 packs of water and 7 packs of candy bars

step-by-step explanation:

35x4=140

140/20=7

the answer for this question is 38