If you’re good with permutations in math 30 please help and answer this easy question below real answers only the number of different orders in which one can watch 3 videos if there are 15 different videos to choose from is

a) 6

b) 455

c) 45

d) 2730

Iwill make brain if you me correctly fill this out needs due today pls and send it back to me (click the link and you will get it)

Kapil needed to buy a long wooden beam. he went to two sawmills that each charge an initial fee plus an additional fee for each meter of wood. the following equation gives the price (in dollars) of a wooden beam from the first sawmill as a function of its length (in meters). p = 5+20xp=5+20x

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11