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Ahat [919]
3 years ago
7

A cell phone plan costs $150 to start. Then there is a $25 charge each month.

Mathematics
1 answer:
grin007 [14]3 years ago
7 0

Answer:

$175

Step-by-step explanation:

Since it’s only one month you just add 150 by 25

Correct me if I am wrong

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You cant because there are 2 different variables

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45% as fraction in the simplest form​
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Factorizar: (11x3 – 2y)2 =
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Answer:

66-4y

Step-by-step explanation:

(11x3 – 2y)2
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6 0
2 years ago
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A supervisor records the repair cost for 14 randomly selected refrigerators. A sample mean of $79.20 and standard deviation of $
Nitella [24]

Answer:

( $74.623, $83.777)

The 90% confidence interval is = ( $74.623, $83.777)

Critical value at 90% confidence = 1.645

Step-by-step explanation:

Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.

The confidence interval of a statistical data can be written as.

x+/-zr/√n

Given that;

Mean x = $79.20

Standard deviation r = $10.41

Number of samples n = 14

Confidence interval = 90%

Using the z table;

The critical value that should be used in constructing the confidence interval.

z(α=0.05) = 1.645

Critical value at 90% confidence z = 1.645

Substituting the values we have;

$79.20+/-1.645($10.42/√14)

$79.20+/-1.645($2.782189528308)

$79.20+/-$4.576701774067

$79.20+/-$4.577

( $74.623, $83.777)

The 90% confidence interval is = ( $74.623, $83.777)

5 0
3 years ago
What type of function is y=7(5/4)^x
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Answer:

It is a equation

Step-by-step explanation:

Because it has an equal sign if it does not it will be a expression.

4 0
3 years ago
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