Final answer:
Real images are always inverted, but can be larger or smaller than the object. Virtual images are always upright and cannot be projected.
Step-by-step explanation:
The statement that is true about images formed by spherical mirrors and thin lenses is: Real images are always inverted, but they can be either larger or smaller than the object. Virtual images, on the other hand, are always upright and cannot be projected.
For example, when a slide projector forms an image larger than the slide, it is a real image. On the other hand, a camera makes an image smaller than the object being photographed, which is also a real image.
Virtual images can only be seen through an additional lens that forms a real image.