Alex goes to the store to buy groceries he has 20 to spend at the store write an inequality to represent the amount Alex can spend​

ax+by=20

a represents how many first items you bought

x represents the cost of the first item

b represents how many second items you bought

y represents the cost of the second item

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.

thats not a system of equations, that is a solution