5 days and 12 hours = 132 hours
9900 total watts / 132 hours = 75 watts per hour
Since the light bulb consumes 75 watts an hour, we need to multiply 75 watts by 24 hours, to figure out how many watts are consumed in a day.
75 watts per hour x 24 hours = 1,800 watt-hours per day
810
.....+27+31+35+39+43+47+51+55+59+63+67+71+75+79
Answer:
y=2
Step-by-step explanation:

f(x) = 6x
To find the inverse, replace f(x) with Y:
y = 6x
Now switch the variables:
x = 6y
Solve for Y by dividing both sides by 6:
y = x/6
Now replace y with f^-1 (x):
f^-1 (x) = x/6
10(x+9)-x
Distribute
10x+90-x
9x+90
There it depends what it is equal to
For example 10(x+9)=x
Or 10(x+9)-x=0