10 POINTS PLEASE HELP the arthemitic mean of 5, 10, 15, and z is 20. what is z

z = 50

Step-by-step explanation:

There are 4 numbers in total (5,10,15,z)

The mean is when you get the total of all the numbers and divide by how many there are

If you do the inverse then that means that 20 x 4 = total of all 4 numbers

80 = 15 + 10 + 5 + z

80 = 30 + z

z = 80 - 30

z = 50

You can check you answer at the end

hope this helps :)

let m = monomial

let t = trinomial

so, m times t = t.

monomial times a trinomial = another trinomial.