Question 10.3 (P4/P5) Show that 3 + 11 + 19 +· · ·+ (8n−5) = 4n 2 −n. (Your first step should be to rewrite the Left Hand Side of the equation using summation notation.)

20. threshold braking in the vehicle's braking system occurs when a. the brake pedal is pushed, heel on floorboard, with full foot pressure. b. the brakes are exerting full braking power, without traction loss. c. the driver begins pushing down the brake pedal, with moderate slowdown. d. the brakes just begin to take hold with a gradual slowdown.

Which of these questions might a character ask if the conflict is man versus self? a. which path should i take to better myself? b. which boulder will be too heavy for me to carry? c. which friend is going to ditch me today? d. all of the above

Ais a machine that makes work easier when a single force is applied. a simple machine b compound machine c endangered machine d complex machine