find the derivative:

y = (4xe^x) / (x^2+1)

Find the perimeter of a trapezoid with sides that measure 19.5 inches, 7.37 inches, 4.8 inches, and 12 inches.

Find the volume of the large solid without the smaller solid. The solid is a right solid and is not drawn to scale. Round answers to the tenths place. A rectangular prism has length 12.4 meters, height 9 meters, and width 7.8 meters.

Between which two integers will 745 be located? Explain how you know. Your answer 1

Which of the following statements best describes an experiment? The researcher does not takes measurements or surveys. The researcher will separate the sample population into groups. The researcher does not influence the population.

What is the linear equation for 3x+4y=-11 and 7x-5y=3

What is the vertex of the function in #5

he mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. Which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?

The value of the 2 in 204.75 is how many times the value of the 2 in 103.52

A+b=s+r for s I have no idea how to solve this

What is the degree of a polynomial that has roots of - 2, 4i and - 4i?