Which shows the best use of the associative and commutative properties to make simplifying - } - 10 + 7+ + 5 easier?
O A. [-} + (-10)] + [7+ { +5]
B. [5+(-3) + (-10)] + ( + 7)
O C. (-5+ 3) + [5+7+ (-10)
OD. [-}+7+(-10)] + (5 + $)
SUBMIT

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step-by-step explanation:

2x + 8

step-by-step explanation:

an = 22 + (n-1) *6

110 seats

step-by-step explanation:

an=a1+(n-1)(d)

a1 = 22   this is the first item in the sequence

d =6   this is how the sequence goes up

a)   an = 22 + (n-1) *6

b) a12 = 22 + (12-1) *6

    a12 = 22+11*6

  a12 = 22 +88

  a12 = 110