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babymother [125]
3 years ago
6

Lacoste Middle School surveyed its student population about their favorite mobile

Mathematics
2 answers:
stepan [7]3 years ago
7 0

The <em><u>correct answer</u></em> is:

409

Explanation:

Let x be the number of students who listed instagram as their favorite.  "32 fewer than two times" x would be

2x-32

We know that this is the number who preferred the other site, which is 786:

2x-32 = 786

Add 32 to each side:

2x-32+32 = 786+32

2x = 818

Divide both sides by 2:

2x/2 = 818/2

x = 409

mash [69]3 years ago
5 0
786 listed Facebook as their favourite app.



-32

x2

786 -32 = 754

754 ÷ 2 = 377.

Idek if this is right I wasn't sure about question sorry
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Step-by-step explanation:

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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 $
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Answer:

( $74.623, $83.777)

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

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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.

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Using the z table;

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z(α=0.05) = 1.645

Critical value at 90% confidence z = 1.645

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$79.20+/-1.645($10.42/√14)

$79.20+/-1.645($2.782189528308)

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$79.20+/-$4.577

( $74.623, $83.777)

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

5 0
3 years ago
Jason observed a large art sculpture in a local park and wanted to know its height, but the sculpture was much taller than he co
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The art sculpture was 70 inches aka 5.9feet tall and if we round it well it would be 6feet so that would be its highest piont
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Now, using the same formula let's calculate the speed for 20 minutes (30 minutes - 10 minutes earlier = 20 minutes)

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