So this has to do with permutations and honestly i need an explanation on how i can figure these out.

Well, the answer quite simple there are 4! ways to arrange these numbers...and as 4! = 4*3*2*1 = 24

hence 24 is the correct answer

u can also remember it by theorem of multiplication asin first place (I.e. first code can be any no. out of 4,5,2&7 so 4*

as first place is acquired by a certain no. that leaves three no. to fill third place and when third place I'd occupied it leaves 2 numbers to fill second place and lastly only one no. to fill the last place so it's result will be like 4*3*2*1.

I know this is pretty much confusing but still I tried my best

if anything troubles u here feel free to ask me

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.

These graph is cross the yaxis and x axis two ways.