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4 years ago

-9 – 9u = -3u + 9 last one for today

Mathematics

2 answers:

otez555 [7]4 years ago

7 0

U=-3 since you take out the coefficients first then multiply

Yakvenalex [24]4 years ago

6 0

-9u + 3u = 9 + 9
-6u = 18
u = -18/6
u = -3
Thus, u is equal to -3

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We are given that:

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This means that:

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We use cross multiplication to get the time she took to drink $1\frac{17}{42}$ cups

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This means that she was awake for $4\frac{11}{12}$ hours

Finally, we convert this to minutes:

Knowing that 1 hour has 60 minutes, therefore:

She stayed awake for $4\frac{11}{12} * 60 = 295$ minutes

Hope this helps :)

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