Find the length of the unknown side round your answer to the nearest whole number

1. what are the missing reasons in the proof 2. it's in the second picture and 3

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?

Given f(x) = 2x^2- 5x+1, determine the function value f(2). do not f(x) = in your answer