You sign up for karate classes. the classes cost $80\$80$80dollar sign, 80 per month.write an equation for the number of dollars, , that you pay for your karate classes if you take classes for months.

The first thing we must do for this case is to define variables.

We have then:

m: number of months

d: total amount in dollars

We now write the equation that models the problem.

We know that the monthly payment is $ 80.

We have then:

an equation for the number of dollars, d, that you pay for your karate classes if you take classes for m months is:

No

Step-by-step explanation: The set of counting numbers {1, 2, 3, 4, ...} is called the set of natural numbers. The natural numbers begin with 1 and go on indefinitely.

Decimals are not natural numbers unless they have a 0 after the decimal point that repeats. However, 2.8 does not so it's not natural.