If a(x)= 2x-4 and b(x)=x+2 wich of the following expression produces a quadratic function

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?

You are a clerk at convenience store. a customer owes 11.69 for a bag of potatoes chips. she gives you a five dollar bill. how much change should the customer receive?

Divide. write in simplest form 41/6 divided by 10