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prohojiy [21]
3 years ago
9

6 and Find the value of this expression if x y--1. xy2 -5

Mathematics
1 answer:
zysi [14]3 years ago
5 0

Answer:

y = 5;  x = 1/5

Step-by-step explanation:

xy = 1    ----->  x = 1/y

xy^2 = 5 -----> 1/y * y^2 = 5

y^2 / y = 5

y = 5

5x = 1

x = 1/5

Hope this Helps!

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A small independent organic food store offers a variety of specialty coffees. To determine whether price has an impact on sales,
lorasvet [3.4K]

Answer:

b= -4.68

Step-by-step explanation:

Hello!

We have to study variables:

Y: Monthly coffe sales

X: Price per pound of coffe ($)

The estimate regression line is

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The slope of the estimated regression line is represented by b.

The formula I'll use to calculate it is:

b= [n∑xiyi -(∑xi)*(∑yi)]/ n∑xi²-(∑xi)²

To calculate b we need to do some auxiliary calculations:

∑xiyi= 4213.15

∑xi= 87.47

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5 0
2 years ago
Ski resort charges snowboarder fee of $40 plus 8.5 per hour c(t)=__t+_____
Natalija [7]
Your equation would look a lot like this 
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6 0
3 years ago
Twice the difference of a number and 9 is equal to three times the sum of the number and 6. Find the number.
topjm [15]

Answer:

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5 0
3 years ago
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VMariaS [17]

Answer:

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Step-by-step explanation:

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3 0
3 years ago
A university administrator was interested in determining if there was a difference in the distance students travel to get from c
olasank [31]

Answer:

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Step-by-step explanation:

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How we take the decision?

The significance level is the standard of 0.05.

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In this question:

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8 0
3 years ago
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