im literally crying because im so stressed and i don't understand if you know the answer please help i will do anything :(

What is the inverse of the function f(x)=2x+1

Find the total area for the regular pyramid ( follow the answer set up in the picture)

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.