If f(x)=12x-7 then,
f'(x)= ?

related to Derivatives of constant and linear functions. Would appreciate it if you could explain the answer as well thank you

Me find the value of x each figure.

Amountain climber starts a climb at an elevation of 453 feet above sea level at his first rest stop he has climbed 162 feet and by his second rest stop he has climbed another 207 feet its getting late in the day so the climber starts his way down if the climber desends 285 feet how much does he need to ascend or descend to return to the original starting point

Annabelle's homework is 75% it took her three hours how long should she estimate it will take her to complete her homework.