{I need help- please T^T} Question: Which of the following expressions are equivalent to..
(I can't type it but ill put a picture of it)

Khan Academy! B

Step-by-step explanation:

-(-b)/a  can be written as (-(-a))/b

double negatives give a positive: a/b

and we can similarly manipulate option B to get a/b (a/(-(-b))) is a/b

thus the expression is equivalent to option B

the correct answer is 5 6 and 7

whole numbers.

step-by-step explanation:

we are given the average monthly rainfall (in millimeters) model r(m) for the years 1900-2009 as a function of the month number m.

as we can see m is taken for the number of months for years 1900-2009.

we know that number of months can't be a negative number or decimal number or a fraction.

so, the number of months could be only positive whole numbers.

therefore, whole numbers is more appropriate for the domain of r.