How do you work out: ben and sue shared £60 in the ratio 2: 3. work out how much each person gets

Find the quotient. 50a2 – 98b2 -5a +7b

What is r i 4.5+10r=-6.5 with work pls

Use the method of cylindrical shells to find the volume v generated by rotating the region bounded by the curves about the given axis. y = 7ex, y = 7e^-x, x = 1; about the y-axis