What is the value of the expression below when z = 3?
10z squared + 7z + 4
To find the value of the expression when z = 3, substitute 3 in place of z in the expression:
10(3)^2 + 7(3) + 4
= 10(9) + 7(3) + 4
= 90 + 21 + 4
= 115
Therefore, the value of the expression when z = 3 is 115.