Since there are 2 semesters per year we have:
(1/2)(24,870 - 7,560) = $8,655
David would have to contribute $8,655 per semester.
The correct answer of

if x=4 is 272.
to solve the equation if x equals 4, you must substitute the x of the 4.

then solve by order of operations.
solve what is inside the parentheses first

then do the multiplication of the factors

then the final step, adding, to get the solution of 272
Step-by-step explanation:

3.3333333 repeating
Take 10 and divide it by 3
it is greater than because when you multiply 8 by 3 you get 24
and you get the 3 because 3 feet make 1 yard.