sand dollar. n. 1. Any of various thin circular echinoderms of the order Clypeasteroida, especially Echinarachnius parma, of coastal northern Atlantic and Pacific waters, having a covering of short movable spines.
One reason why linear algebra is very useful is that linear transforms of normal variables are normal. If x ~ N(a, A), then Bx+b ~ N(Ba+b, BABT). In a way, when everything is linear and normal, everything is nice and analytically tractable.
Algebra is used in cooking with recipes. Algebra is â¦ used in budget planning. Algebra is used in gardening. Algebra is used in plumbing. Algebra is used in sewing. Algebra is used in mechanics and tools. Algebra is the math of real life.Many people who use algebra every day don't even realize they are using it.es it can be used in real life situations take a batch of colddrinks at colddrink factory when they are packed.they are inserted into circular queue &when any one colddrink â¦ is ready then it is not yet selected by machine but machine fetched bottles of colddink in that order in which they are inserted.