Um... these aren't actually "equations". Were the instructions really to "solve", or were you maybe supposed to "convert the coordinates"...?

If so, then note that (3, 3) in rectangular means "x = 3 and y = 3". What then is the value of r? (Use the formula they gave you for this.) Since , what must be the value of

The polar coordinates means that r = 8 and . Plug these into the formulas they gave you for x and y.