Solve -8x +y=23 and -x+6y=-3 using substitution method

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?

Abag contains 3 red marbles 4 white marbles and 5 blue marbles if one marble is drawn from the bag what is the probability that the marble will be blue

The area of the map is the product of the length and width. write and expression for the area as the product of the two binomials do not multiply