brooklynhawsey brooklynhawsey

13-02-2017
Mathematics

contestada

The swimming pool at Spring Valley High School is a rectangle with a width of 75 meters and a length of 35 meters. Around the perimeter of the pool is a tiled floor that extends w meters from the pool on all sides. Find an expression for the area of the tiled floor.

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apologiabiology apologiabiology

13-02-2017

same as before

total=(2w+75)(2w+35)=4w²+220w+2625

pool=75 times 35=2625

minus pool from total
4w²+220w+2625-2625=4w²+220w

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