It would be graph W because the cost will increase, so that gets rid of Y... It has to start at 40 for the original cost, getting rid of Z and X
Time spent babysitting by Lucy = Tl = 4 hours
Time spent babysitting by Maria = Tm = x * 4 hours
Now we need to determine for what values of x is Tm > Tl
⇒ x * 4 > 4
⇒ x > 1
So for x > 1, Mary spends more time babysitting than Lucy does
The square roots of 324 is 18
Answer:
D(x) = 3x
Step-by-step explanation:
Micah travels at a rate of 'x' feet over a specific period.
Linda travels at a rate of '2x' feet over that same period.
Since they are walking in opposite directions, the total distance they have walked towards one another (D) can be determined by adding both distances:

The expression that describes the number of feet they have walked toward one another is D(x) = 3x.