Question

The smith family purchased a new washer and dryer for $1400. They determined that the monthly cost to operate both would be $20. To determine the average monthly cost for owning and operating the washer and dryer over x months mrs. Smith uses the function, c(x) = - 1400+20x *. How the average monthly cost is less than $40?

Answer 1

To determine when the average monthly cost is less than $40, we can set up an inequality with the given function.

The given function is:
c(x) = -1400 + 20x

To find when the average monthly cost is less than $40, we need to find the values of x that satisfy the inequality c(x) < 40.

So, we have:
-1400 + 20x < 40

Adding 1400 to both sides of the inequality, we get:
20x < 1440

Dividing both sides by 20, we get:
x < 72

Therefore, the average monthly cost is less than $40 for x values less than 72.