Find the product of 2 numbers whose sum is 11 and difference is 3

28

Step-by-step explanation:

x,y

X+y=11

X-y=3

x=y+3

y+3+y=11

2y=8

y=4

X=7

Xy=28

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.