I believe its c because bio has to do with life
Answer:
(3a+2)/a(a+2)
Explanation:
(1/a)+(2/(a+2)
we cannot add any unlike fractions simply,we have to make it's denominator equal to add
you can do it by simply multiplication or by taking lcm of the the denominator!
here , it's 'a' and 'a+2'
now we got a modified denominator a(a+2), to make it fair to each term we have to multiply the extra multiplicand to numerator too
in case of 1/a, denominator becomes a(a+2) ,so we have to modify numerator also by multiplying the extra (a+2) to numerator also ,now 1/a becomes (a+2)/a(a+2)
---- similarly other term={2/(a+2)}can be modified as 2a/a(a+2)
now both denominator are equal , now new can add it simply by it's numerator
i.e, (a+2)/a(a+2) + 2a/a(a+2)
= (3a+2)/a(a+2)
it's from basic of fraction's addition!
✌️:)
When we're sick, our noses are often blocked with mucus. Also, the tissues inside our nose can become swollen and inflamed. This prevents us from smelling properly. Because your sense of smell is so tied to your sense of taste, if you can't smell things properly, you won't be able to taste them properly, either.
Answer: Amphibians and water animals.
Explanation:
Answer:
answer is b
it allows specific substances to cross through it