MTHOMBENI BAFANA

Given a 30cm by 30cm sheet of metal has squares of side x cm cut from each corner. Calc. the dimension for the greatest volume.

The line 2y+7x=5 and 4x+dy+3=0 are perpendicular to each other. Find the value of the constant.

I don't understand exactly how you get the slopes of the graphs. May you please get it into details till the end.

The line 2y+7x=5 and 4x+dy+3=0 are perpendicular to each other. Find the value of the constant 'd'. (5marks)

A CONE WAS CONSTRACTED FROM PLASTIC, HAVE A HEIGHT OF 20cm (PART C). THE LID IS MADE UP OF HEMISPHERE HAVE RADIUS 0F 5cm (PART A) AND PYRAMID HAVE VOLUME OF 81,667cm³. THE LID FITS EXACTLY OVER THE CONE. A) CALC. THE VOL. OF PART A. B) CALC. THE VOL. OF P...