Answer:
2 + (3 + 4) = (2 + 3) + 4 ⇒2+7 = 5+4.
Step-by-step explanation:
Answer:
1 mile every 7.6 min
Step-by-step explanation:
Answer:
9
Step-by-step explanation:
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24 marbles in the first group
28 marbles in the second group