A machine originally cost $15600 has a value of $7500 at the end of 3 years and $2800 at the end of 8 years. Find the rate of change in value ( depreciation) between its purchase and the end of 3 years. B. Find the average rate of change in value of the machine between the end of 3 years and the end of 8 years.

The answer is a. point

Okay so n is going to represent our first number. since the second number of five times greater than n, the second number will be represented as 5n. for us to figure out the two  numbers we need to have  the value of n first. this is going to be done by adding the two numbers together, n and 5n. it can be simplified as 6n, which the problem states is equal to 72. divide 72 by 6n and you can solve for n.  n+5n=726n=72n=(72/6)n=12  now that we know the value of n, we have to multiply 5 times 12 which equals 60. so our two numbers/integers are 12 and 60

Iimagine the answer is b.