2n +7 is greater than or equal to 27 or 3+3n is less than or equal to 30. what is n?

this is written as

change the greater than or equal to sign to equal to in order to solve it

thus

dividing through by 2

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it is contrapositive

i could not see the question too well so check yourself again too . this is because i want you to get it correct.

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.