Which of the following is not an equivalent expression to -12 - 7x? -7x + 12 -7x - 12 -7x + (-12) -12 + (-7x)

-7x + 12 is not an equiv. expression because one of the - signs in the original expression has been changed to +.

-2 is the right

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.