If you have a 43 degree angle, what is the measurement of the angle which is complementary to it?

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

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 %