A square matrix is called idempotent if (we write to represent ). Suppose that ( ) is a matrix such that is invertible. Prove that both and I_n-〖X〈X^' X〉〗^(-1) X^' are idempotent. (Hint: use this property of matrix multiplication: ).

the workers who do no drive has no reasonable reason to buy gasoline due to they don't have anything to use it for

0.038

step-by-step explanation:

30.5*10=350$

you have to multiply the number without the decimal point then add it later but if its tenn u must move the place value of the decimal point 1 to the right.