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Arturiano [62]
3 years ago
10

Eight values have a mean of 7. a ninth value is added. the new mean is 9. what is the new value

Mathematics
1 answer:
My name is Ann [436]3 years ago
4 0

Answer:

25 because the 8 values must times with 7 and will get 56. when the ninth value added , let the ninth value as y , 56+y , the new mean is 9 . so it will be like this , 56+y over 9 times with 9

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Answer:

f(x)= $70 - $1.5*x

Step-by-step explanation:

You know your friend spends $ 5 to enter the fair and $ 15 for food. So the total you spent is given by:

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Knowing that the trips at the fair cost $ 1.50 per trip, and with x being the number of trips, then the cost after x trips will be:

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Knowing that your friend has $90 when he goes to the fair, to calculate the amount of money he has left after x rides, the amount taken to the fair and the amount spent is subtracted:

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By calling the function f(x) used to determine the amount of money left after x trips, you can finally express:

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