Tara solved the following problem by doing the work shown. Which property did she use? (-2 · -8) · 9
= -2 · (-8 · 9)
= -2 · -72
= 144

identity property of multiplication
associative property of multiplication
commutative property of multiplication

Grading scale 1 has the following weights- (tests- 50% quiz- 25% homework- 15% final exam- 10%). calculate your final average if your performance in the class is as follows-test grades- {88, 84, 90, 75, 70, 81); quiz grades- {88, 67, 90, 90, 45, 99, 76, 98, 100}; homework- 90; final exam- 75