Which of the following number sentences illustrates the associative property of multiplication? (3 × 8) × 6 = 3 × (8 × 6) 2 × (1 × 9) = (2 × 1) × (2 × 9) 1 × 15 = 15 8 × 9 = 9 × 8

no

step-by-step explanation:

2-7=-5

7-2=5

when you combing like terms for ech expression, 5 and -5. these numbers are not equal to each other.

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation: