Adrian is asked to use the graph to solve the equation x² - 2x - 1 = 0
He intends to do so by drawing a straight
line on the grid.
Complete Adrian's method to find estimates
for the solutions to the equation x² - 2x - 1 = 0
You must show how you get your solutions.

Before it was launched, a helium-filled balloon had a pressure of 201 kpa at a temperature of 27°c. at an altitude of 15,000 m, the pressure had decreased to 2.5 kpa and the temperature had dropped to -14 °c. the volume of the balloon increased to 59.3 m3. what is the original volume of the balloon? 13 m3 0.85 m3 0.077 m3 1.17 m3