Which value must be added to the expression x2 16x to make it a perfect-square trinomial?

Need will give 100 ! in no less than one hundred fifty words, explain why it is important for engineers to sketch designs and use them to clarify their designs to other people, giving at least three reasons.

Which of the following sections on the sat presents the questions in order of difficulty, from easiest to hardest, within each question type? select all that apply. math test writing and language test reading test

True or false jupiter’s large size causes it to complete rotations more slowly than the other planets.