The water level in Rafael's fish tank must be at least 11 in. For his fish to be healthy. He starts with a water level of 11 12in. Then the water level decreases 78in. Rafael adds water, but not enough for the fish to be healthy. How many inches of water could Rafael have added? Show your work

Measures of the angle of r, 31 s (x+4) t (3x+9)

Me with this one question, and i'll upvote the brainliest answer

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