The average weight of a 7-year old girl is 49 pounds. The average weight of an 11 year old girl is 77 pounds.

1 answer:

Aneli [31]3 years ago

8 0

I only know D. but I'll try to figure out the rest too. D. 9 years old

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algol13

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dezoksy [38]

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Julli [10]

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The answer may be 10 :)

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2 years ago

anygoal [31]

Answer:

Step-by-step explanation:

Sum of 'n' terms formula is given by:-

s=n/2(2a+(n-1)d)

s=13/2[2xa+(13-1)5]

s=13/2(2xa+12x5)

s=13/2(2a+60)

585=13/2(2a+60)

585 x (2/13) = 2a + 60

90 = 2a + 60

90-60 = 2a

30 = 2a

a = 15

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3 years ago

Aleks [24]

5672 ok ok ok ok ok ok ok

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3 years ago