Nitrogen makes up about 78% of the air you breathe by volume. If there is a room that is 150 liters in volume, how many liters of nitrogen are there?
liters

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.