Edward went to the market with Rs 4x2+y2+3y and spends Rs 2x2+y for a packet of chips and chocolate for the remaining money. How much is the cost of chocolate? Pls answer

4. a spring scale is constructed so that each 0.10-n increment is separated by 0.50 cm. what spring constant is necessary for the scale to be accurate? -1.0n/cm -0.10n/cm -9.8 n/cm -0.20n/cm

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

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)