PLEASE HELP ME TY<3

Give the equations of two different lines that are perpendicular to the line 3x + 4y = 7.

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 %

Peter measures the angles in a triangle. he finds that the angles are 95, 10 and 75. is he correct? explain your answer