Solve for X in the proportion below

How many square feet of out door carpet will we need for this hole? 8ft 3ft 12ft 4ft

3x + 4y = 5 x- 3y = -7 solve by substitution

The edge of a cube was found to be 30 cm with a possible error in measurement of 0.4 cm. use differentials to estimate the maximum possible error, relative error, and percentage error in computing the volume of the cube and the surface area of the cube. (round your answers to four decimal places.) (a) the volume of the cube maximum possible error cm3 relative error percentage error % (b) the surface area of the cube maximum possible error cm2 relative error percentage error %