5: staying sharp
solve this system of two linear equations using the
substitution method.
2x + y = 8
y = x-10

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

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?