Jesse and lisa start a business tutoring students in math. they rent an office for $200 per month and charge $15 per hour per student. assuming there are 4 weeks in the month, and they have 10 students each for one hour per week, how much profit do they make in a month? they make $ per month.

$400

Step-by-step explanation:

Ok so they loose $200 per month.

10 students go for 1 hour per week and pay $15

10x15=150

$150 per week

4 weeks in the month

$150 x 4 = $600

-$200 rent

$600-$200=$400

They make $400 per month

Step-by-step explanation:

what do you need ? the equation itself is true, if you put the same number in both places above 21.

any number is possible there, it will not change the equation.

so, again, I am not sure, what you need here.

let's write it with a variable to make my statements clearer :

9 + 1 x/21 = 10 x/21

that is true, because we can combine the whole numbers first giving us 9 + 1 = 10.

and then we add the fraction again (x/21).

again, you can put any number instead of x, and it will always be true.

example

9 + 1 4/21 = 10 4/21