Answer:
-3
Step-by-step explanation:
If you want to add radicals then radicals should be same as variables in polynomial expressions. If radicals are not equal in nature then we cannot add them. In the case of polynomials, if the variables are not same then we cannot add them. The variables should have the same exponents over them.

In the first parenthesis, multiply the numerators so we get -12 and after multiply the denominator we will get 10
So the fraction in the first parenthesis will be 
To solve the 2nd parenethesis, find the LCD of the denominator.
So the LCD of 5 and 3 = 15,
Now make the each denominator same as that of LCD.
So the new fractions in the 2nd parenthesis =
= 
In the third parenthesis, multiply the numerators so we get 3 and after multiply the denominator we will get 8
So third parenthesis = 
= 
LCD of 12,15 and 8 is 120
=
=
Answer:
99000 meters.
Step-by-step explanation:
We have the swimmer going at 50 m / s, and we want to know where he is going in 33.3 minutes.
The first thing is to pass the time from minutes to seconds, we know that 1 minutes is 60 seconds, therefore:
33.3 min * 60 s / 1 min = 1998 seconds
Now to know the distance is to multiply this time by the speed they give us, like this:
1998s * 50m / s = 99900 m
Which means that in that time and at the speed of the swimmer, he has traveled 99000 meters.