12th grade math. i'm sorta confused. ?

an examination consists of three parts. in part a, a student must answer 2 of 3 questions. in part b, a student must answer 6 of 8 questions and in part c, a student must answer all questions. how many choices of questions does the student have?

Suppose a least-squares regression line is given by modifyingabove y with caret equals 4.302 x minus 3.293. what is the mean value of the response variable if xequals20?

Areal estate agent earns $32,000 a year plus $1,000 for each apartment he sells. write an equation that shows the relationship between the number of apartments abe sells,n, and the total amount he earns in a year,e. what is the total amount abe would earn from selling 10 apartments in one year

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.