Worth brainliest and 10 points

which equations support the fact that rational numbers are closed under addition?

select each correct answer.

√10+(−√10)=0

3√16+3√16=6√16

3√5+√5=4√5

1/2+0.5=1

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

What is the value of f(x) = 2.2 for f(-2)?

Askate shop rents roller skates as shown on the table below. which graph and function models this situation?