SOLUTION: Mellie plans to make a patio 12 feet by 12 feet. She decides to add a border of equal width around the patio to increase the total area to 180 square feet.
What is the width of
Question 1136797: Mellie plans to make a patio 12 feet by 12 feet. She decides to add a border of equal width around the patio to increase the total area to 180 square feet.
What is the width of this border, to the nearest tenth of a foot?
Answer Choices:
x=0.4
x=0.7
x=6.7
x=7.4
x=12.7
Notice that the old patio is a square.
New patio is a square, too.
The new patio side length is = 13.42 feet.
The border width = = 0.7 feet (rounded as requested). ANSWER
Solved.
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To solve this problem, you do not need to setup and to solve a quadratic equation.