Since if he gets the driveway done in 20 minutes he gets 1/20th of the driveway done in 1 minute (if x=20 then x/20=1 by dividing both sides by 20) and if his brother gets 1/12th of the driveway done in one minute, then if t represents the time it takes to shovel the driveway, t/20+t/12=1 driveway shoveled as 1/20+1/12=amount they can do in 1 minute, so t/20+t/12 is how much they can do in t minutes. Multiplying both sides by 20*12=240, we get 12t+20t=32t=240. Dividing both sides by 32, we get 240/32=7.5 minutes to shovel the driveway.
For this case we have the following functions:
By definition of composition of functions we have:
Then substituting:
So:
Answer:
NPER function
Hope this helps... mark as Brainliest plz
Answer:
B
Step-by-step explanation:
Given f(x) = 2x + 5 , that is a linear function.
This is defined for all real values of x
domain is x ∈ R
