Express the column matrix b as a linear combination of the columns of
a. (use a1, a2, and a3 respectively for the columns of
a.) a

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

Liz is shipping a package to her friend. the maximum weight of a medium flat-rate box is 20 pounds, including the box which weighs 6 ounces. write and solve an inequality to describe the possible weight in pounds, w, of the contents that liz will ship to her friend if she must use a medium flat-rate box. use the drop-down menus to explain your answer.

How do you do the foil method with polynomials?