Can someone please help me with this??? I'm so confused

What is the value of the expression [(5)(9) / x] + 6 when x = 3?
a. 5
b. 15
c. 18
d. 21

The image of the point (-6, -2)under a translation is (−7,0). find the coordinates of the image of the point (7,0) under the same translation.

Which of the following is correct interpretation of the expression -4+13

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