PLEASE HELP FASTMatch each description to the expression that can be used to represent it.

The first box on the left goes to the middle box on the right! THe second box on the left goes to the first box on the right! And the last box on the left goes to the third box on the right!

Hope this helps and u understand it

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,