For the function, f(x) = -5x 2, find f(-4).

The value of f(-4) = -80

Step-by-step explanation:

It is given that,  f(x) = -5x²

To find the value f(-4)

Let  f(x) = -5x²

To find the value of f(-4), substitute -4 instead of x

f(-4) =  -5 * (-4)²

 = -5 * 16      [ since (-4)² = -4 * -4 = 16 ]

 = -80

Therefore the value of f(-4) = -80

4/6 = 2/3

so it should take 3/3 hours per man. so 9 hours is the answer 3*3 =9

step-by-step explanation:

the correct answer is x/3+10≥32

hope this !