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PtichkaEL [24]
3 years ago
15

Alyssa got a job as a part-time waitress at a diner. She earns a daily wage of $50 and a 20% tip from the bill amount of the cus

tomers she serves. Which equation represents Alyssa’s total daily earnings (y) based on the total bill amount of the customers she serves (x)?
y = 0.7x – 20
Mathematics
1 answer:
leva [86]3 years ago
8 0
Y = 0.2x + 50
when you convert a percent to a decimal you move it two points to the left then add the 50 for daily earnings
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Answer:

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Step-by-step explanation:

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Lets calculate the partial derivates of M and L, Mx and Ly. They can be computed by taking the derivate of the respective value, treating the other variable as a constant.

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Thus, Mx(x,y) - Ly(x,y) = 2xy, and therefore, the line ntegral is equal to the double integral

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We can compute the double integral by applying the Barrow's Rule, a primitive of 2xy under the variable x is x²y, thus the double integral can be computed as follows

\int\limits^1_0\int\limits^1_0 {2xy} \, dxdy = \int\limits^1_0 {x^2y} |^1_0 \,dy = \int\limits^1_0 {y} \, dy = \frac{y^2}{2} \, |^1_0 = 1/2

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