Question

if the length of the rectangles having perimeter 50cm is taken as x and it's area as a(x), then a.write the relationship between x and a(x) as an equationb. find a(10) and a (15) c. if a(7)=a(k) and k is an even number, then what number is k​

Answer 1

Answer:

Sometimes, air pollution is visible. A person can see dark smoke pour from the exhaust pipes of large trucks or factories, for example. More often, however, air pollution is invisible

Step-by-step explanation:

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