Choose the correct simplification of (4x3y4z5)(5x4y5z3). (5 points) 20x12y20z15 9x7y9z8 9x12y20z15 20x7y9z8

Annie walked her dog 2 1/4 miles from her house to the dog park and 3/7/8 miles around the park.then she walked the same distance home.how many miles did she walk in all?

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 %

What does independent variable and dependent variable mean in math?