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Murljashka [212]
3 years ago
11

Tamir gets paid $12 for every day he feeds and walks his neighbor's dog. Write an equation that would represent the relationship

between the amount of money Tamir gets paid and the number of days he takes care of the dog. Use f to represent the total amount of money and d to represent the number of days.
Mathematics
2 answers:
Nataliya [291]3 years ago
6 0
F=12d, since Tamir gets paid 12 dollars each day, he gets f amount of money. For example if he walks and feeds the dog for two d then he gets 24 dollars total, f
faltersainse [42]3 years ago
4 0
F = (12)(d)
This way he can multiply however many days he worked by 12 (how much he makes a day) to get the total amount of money earned
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Answer: Choice A.)   88.2 < μ < 93.0

=============================================================

Explanation:

We have this given info:

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  • xbar = 90.6 = sample mean
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Because n > 30 and because we know sigma, this allows us to use the Z distribution (aka standard normal distribution).

At 99% confidence, the z critical value is roughly z = 2.576; use a reference sheet, table, or calculator to determine this.

The lower bound of the confidence interval (L) is roughly

L = xbar - z*sigma/sqrt(n)

L = 90.6 - 2.576*8.9/sqrt(92)

L = 88.209757568781

L = 88.2

The upper bound (U) of this confidence interval is roughly

U = xbar + z*sigma/sqrt(n)

U = 90.6 + 2.576*8.9/sqrt(92)

U = 92.990242431219

U = 93.0

Therefore, the confidence interval in the format (L, U) is approximately (88.2, 93.0)

When converted to L < μ < U format, then we get approximately 88.2 < μ < 93.0 which shows that the final answer is choice A.

We're 99% confident that the population mean mu is somewhere between 88.2 and 93.0

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What is the value of x <br><br> A. 20<br> B. 34<br> C. 60<br> D. 69
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Answer:

A

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amid [387]

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multiplying with each terms inside the bracket

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doing the product each of the pair of terms

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taking the sum of terms with coefficient "xy"

8x² - 15y² -2xy + 3xy

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