Simplity the following - (a) 52 - [34 - {4 x 7+ (10 - 5 X 3)}]
(b) 78 = [40 - {48 = - (25 - 4 of 5)}]​

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?

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

What is not true about kl and mn? what is mn? (show your work)