Which expressions are equivalent to 3(x + 3y + 2x − y)?

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

The administrator of a large assisted living facility wanted to know the average age of the residents living at the facility. he randomly selected 12 residents and determined their age, listed here: 80, 65, 75, 83, 68, 73, 88, 79, 94, 72, 79, 68 what's the average age of the sample of residents? a. 79 years old b. 68 years old c. 75 years old d. 77 years old

Given that abcd is a rhombus, what is the value of x?