The variables a, b, c, d, e, and f represent the numbers 4, 12, 15, 27, 31, and 39 in some order. Suppose that:

a+b=c
b+c=d
c+e=f

The value of a +c+f is

73

Step-by-step explanation:

this is because

a=15

b=12

c=27

d=39

e=4

f=31

You can test it out to be sure tho. Hope I helped!!!

6.5

step-by-step explanation:

you said it was in the question

~courtney

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.