210 because 7th graders washed 12 cars, 8th graders washed 14 cars, 6th graders washed 16 cars. Added all together and multiplied by 5, it equals 210
Answer:
16
Step-by-step explanation:
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Answer:
5 × 
Step-by-step explanation:

D. 6 steps forward and 6 steps backward. 6=6