Sara, Tina and Luis each have some money. Sara has £65
Tina has £100
Luis has three £5 notes, one £20 note and some £10 notes.

The mean amount of money per person is £80

How many £10 notes does Luis have?

pls help mee​

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

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

Question 5 of 10 2 points if a population is a sample of the population could be a. registered voters; all citizens o o b. baptists; all religious people o c. people who purchased shoes; all customers o d. the entire school faculty; math teachers