3 years ago

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

Mathematics

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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A survey showed that 30% of students bring their lunch to school. The survey polled 300 students. How many of the 300 students d

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Let's first find how many students bring their lunch to school. This is 30% of 300. To find this value, convert the percentage to a fraction (or decimal) and multiply:

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3 years ago

Read 2 more answers

8(s+3)=72 i need help it is due tomorrow

Montano1993 [528]

Answer:

s = 6

Step-by-step explanation:

8(s+3) = 72

Expand the brackets out:

(8 x s) + (8 x 3) = 72

8s + 24 = 72

Now you get rid of 24 on the left, by taking away 24. But you also have to do the same on the right side so that both sides are equal:

8s + 24 = 72

left(-24) = right (-24)

So that leaves you with:

8s = 48

Now divide both sides by 8 to make them equal and to get s on its own:

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left(/8) = right (/8)

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