Willa is building birdhouses. Each side of the birdhouse will need 9 nails. How many nails does Willa need for each birdhouse? There are 7 sides on the birdhouse. If Willa uses only 7 nails on each side, how will the total number of nails she uses change?

The total number of nails will decrease by 14 when Willa will use 7 nails on each side.Step-by-step explanation:Sides of one birdhouse = 7Nails used on each side = 9 Nails used on one birdhouse = No. of sides * Nails used for each sideNails used on one birdhouse = 7*9 = 63 nailsIf she uses 7 nails on each side, then the number of nails used on each birdhouse will be;No. of nails = 7*7 = 49 nailsDifference = Old value - New valueDifference = 63-49 = 14 The total number of nails will decrease by 14 when Willa will use 7 nails on each side.Keywords: multiplication, subtractionLearn more about subtraction at:brainly.com/question/7490805brainly.com/question/7857079#LearnwithBrainly