Can someone please help

Let f be defined as shown.
What is f^-1 (-9)

Explanation:

The inverse undoes whatever f(x) does. So if the input is x = -8 leads to the output y = -9, then the inverse reverses the process. Effectively, the input and output swap. It's essentially asking the question "if f(x) = -9, then what is the value of x?". In this case, the answer would be x = -8

it costs $20 to interview each person for a survey. find the cost to obtain a +- 3% margin of error.

step-by-step explanation:

copy and paste, put it in google

the correct answer is you spend $55.78 more in a brand store that buy ing in a normal store.

step-by-step explanation:

brand = spend   $ 135.85 total

store = spend $80.07 total