If x < 5, then the sign of the value of the expression -5x2 + 2x + 7 will be ________.
Which of the following is not a part of the respiratory system?
Choose the correct image for the blank space given above.
Fill in the blanks using the correct option for the following statements from the given alternatives.
________ substances possess the Van der Waals attraction force.
What pattern will the transparent sheet resemble when folded along the dotted line?