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notka56 [123]
3 years ago
8

The Lone Star Shipping Company charges $14 plus $2 a pound to ship an overnight package. Discount Shipping Company charges $20 p

lus $1.50 a pound to ship an overnight package. For what weight is the charge the same for the two companies?
Mathematics
1 answer:
Ymorist [56]3 years ago
4 0

Answer:

12 pound

Step-by-step explanation:

Let x be the weight of the package.

For Lone Star Shipping, the cost will be:

2x + 14

For Discount Shipping Company, the cost will be:

1.5x + 20

We hence equate these two expressions equal to each other, since the cost should be same.

2x + 14 = 1.5x + 20 \\2x - 1.5x = 20 -14\\0.5x = 6\\x = 6 \div 0.5\\x = 12

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The data show the number of viewers for television stars with certain salaries. Find the regression​ equation, letting salary be
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Answer:

y = 5.064 - 0.010x

Here, in this question x = 33

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In this question data is missing and I filled it out and calculated the questions accordingly. Please refer to the attachment for the data calculated.

Step-by-step explanation:

First of all, this question is incomplete. It lacks the data needed to calculate the required things.

So, I  figured out the question and I will try my best to solve the question at hand.

I have calculated the some data sheet in excel. Please refer to the attachment for that data.

let a be the salaries

b be the viewers

S_{aa} = ∑a^{2}  - \frac{ Summtion  a^{2} }{n}

S_{aa} = 7522.8571

S_{bb} = ∑b^{2}  - \frac{ Summtion  b^{2} }{n}

S_{bb} = 47.1943

S_{ab} = ∑ab^{}  - \frac{ Summtion  a x Summation b^{} }{n}

S_{ab} = -76.8286

Now the slope of the required regression equation is:

Slope =  S_{ab}/S_{aa} = -76.8286/7522.8571 = -0.010

And the intercept of the required regression equation:

intercept = \frac{1}{n} x (∑b - slope x ∑a) = 5.064

So, the regression equation will be:

y = intercept + slope x

y = 5.064 - 0.010x

Here, in this question x = 33

y = 5.064 - 0.010 (33)

y = 4.734 million views

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