9. Let u be a nonzero vector. (a) Show that u · y = uw does not necessarily imply that v=W. (b) What geometric relationship must u, v, and w satisfy if u. v= u. w?

25) 56(1) = 5b a. identity property of addition b. identity property of multiplication c. commutative property of multiplication d. commutative property of addition

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.

Determine which postulate or theorem can be used to prove that lmn =nmo