dariyanhilson8pbeb7f dariyanhilson8pbeb7f
  • 05-07-2018
  • Mathematics
contestada

the area of a square piece of cardboard is 81 square inches

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choixongdong
choixongdong choixongdong
  • 05-07-2018
Lets x = side of square
Area of square = side times side = x * x = x^2

Given:
Area = 81 square inches
so
A = x^2
81 = x^2
x = √81
x = 9

Answer
side = 9 inches
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