If the ratio is 14 childen to every 5 teachers, and there are thirty teachers... there are 84 children. hope I could help!
Multiply by z to get
wz = xy
divide by x
y = wz/x
Assume Charles charges $7*3=$21 if he babysits for 2,5 hours (that is 2 and a half hours).
That is we are not considering Charles babysitting exactly 1, 2, 3 or 4 hours, but also in between times.
then we can write the following piecewise function to describe the situation:
f is a function from (0, 4] to {$7, $14, $21, $28}
The answer is 12
Explanation: as you replace -2 it will give 4 so when u add 4 to 8 it equals to 12