The answer is 7
f(x) = -4x - 1
f(-2) = ?
Since f(x) = f(-2), then x = -2. Now just substitute x in the function:
f(-2) = (-4) * (-2) - 1
f(-2) = 8 - 1
f(-2) = 7
We are told that to calculate the depth d of snow, in centimeters, that accumulates in Harper's yard during the first h hours of a snowstorm we can use the equation: .
To find number of hours it will take for 1 centimeter of snow to accumulate in Harper's yard we will substitute d=1 in our given equation.
Dividing both sides of our equation by 5 we will get,
Therefore, it will take of an hour or 12 minutes for 1 centimeter of snow to accumulate in Harper's yard.