Sebastian studies from 3: 15 - 4: 45.his sister, sarah studies from
4: 30 - 6: 15.who studied longer and by how much?

Choose the number sentence that shows the identity property of addition. a. 122 = 61 + 61 b. 62 = 1 + 61 c. 61 = 0 + 61

How do you solving the solution of each system using elimination?

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 =