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Masteriza [31]
3 years ago
11

Emma received a $40 gift card that could be used to download television programs. After downloading 5 programs, she had $30 rema

ining on her gift card. If each program cost the same amount to download, what is the cost of one download? On your work paper, be sure to define your variable, write an equation, solve and write your final answer in a sentence.
Mathematics
1 answer:
aalyn [17]3 years ago
8 0

Answer:

x= 1 program

x= $2

Step-by-step explanation:

40-30= 10 <- what she spent

10/5 = 2

5 = Amount of Programs

Each program is $2.

Your welcome :)

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Assume the sample below is a perfectly random sample of students at a school. How much greater is the mean of the
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Answer:

0.75

Step-by-step explanation:

The table is not well presented (See Attachment)

There are at least two approaches to this question

Method 1:  

Steps

1. Calculate the mean of reported heights

Mean of reported heights = (61+68+57.5+48.5+75+65+80+68+69+63)/10

Mean of reported heights = 655/10

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2. Calculate the mean of measured heights

Mean of measured heights = (62 + 68 + 56.5 + 47 + 72 + 65 + 78 + 67 + 69.5 + 62.5)/10

Mean of measured heights = 647.5/10

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3. Get their difference

Difference = Mean of reported heights - Mean of measured heights

Difference = 65.5 - 64.75

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Method 2: Calculate the mean of their difference

Mean of difference = Sum of difference / Number of observations

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Note that in both cases, the result is 0,75.

Hence, the reported heights at the school is 0.75 greater than the actual measured height

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