"when obtaining a stratified sample, the number of individuals included within each stratum must be equal."

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10

How many terms does the polynomial x^2 y^2 have

Find the volume of the solid obtained by rotating the region enclosed by the curves y=1x and y=7^-x about the x-axis. (use symbolic notation and fractions where needed.) volume =