Can you get a full picture? Part of it is missing.
R + 75 = 200 . You take away 75 from 200 and r = 125 so 125 is the answer
Well 5 + 4 is 9, and so if the girls are 5 in the ratio, the fraction would be 5/9. I hope this helps!
For this case, we must find an expression equivalent to:

By definition of power properties we have:

Rewriting the previous expression we have:
The "-" are canceled and we take into account that:

So:

According to one of the properties of powers of the same base, we must put the same base and add the exponents:

Answer:

Option B
What do u mean like 82+82?