Hari bought some files and pens in the ratio 7: 6. He spent a total of $198. A file cost $3 and a pen cost $2. (a) How many files did Hari buy? (b) If Hari bought one more file than pens, how many files and how many pens could he buy with the same amount of money? please help me!
Thanks million​

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range is infinite on both x and y axis positive and negative

step-by-step explanation:

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.