What does x equal -4 = x - 93/-1

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?

On average, how many more hits will he get when he bats 100 times at home during the day as opposed to 100 times away at night?

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0