Three times a number is 42. what is the number? 12 14 16 39

The function f(x)= -(x+5)(x+1) is down. what is the range of the function?

How are algebraic expressions evaluated using substitution?

To diagonalize an nxn matrix a means to find an invertible matrix p and a diagonal matrix d such that a pdp d p ap or [1 3 dh epap 3 let a=-3 -5 -3 3 3 1 step 1: find the eigenvalues of matrix a "2's" step 2: find the corresponding eigenvectors of a step 3: createp from eigenvectors in step 2 step 4 create d with matching eigenvalues.