simplify the following question: 3×2+5y2?+3?+4y2+4y2+6 simplified expression 9×2-y2+9which could make the expression equivalent? a)+6x2 and -6y2 b)+6x2 and10y2. c) +9x2 and 10y2. d) +9x2and-6y2

Need on this one asap im almost done with this subject

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 %

Atotal of 766 tickets were sold for the school play. they were either adult tickets or student tickets. there were 66 more student tickets sold than adult tickets. how many adult tickets were sold?