Zach has test scores on 92, 98, 65, 77, 91 and 85. He has one more test, what score does he need to get an average of 85 for the semester

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

Three times the sum of a number and seven is negative thirty-six. what is the number?

What is the lcm of 16 and 40 ? 24 and 40 ?