May someone please help me. Please be kind enough to show work because I don't understand.

How do i do this? i don’t understand

Standard deviation of 19,29,21,22,23

Examine the two-step equation. − 7 4 + x 4 = 2 which property of operations allows you to add the same constant term to both sides? amultiplication property of equality bdivision property of equality caddition property of equality dsubtraction property of equality