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matrenka [14]
3 years ago
10

Slope-Intercept Applications ( = mx +O)

Mathematics
1 answer:
Afina-wow [57]3 years ago
5 0

The cost of downloading the app and downloading 30 songs is $40.7

Step-by-step explanation:

The equation can be written using slope-intercept form

Let x be the number of songs

Then

$1.29 per song will be written as

1.29x

for x number of songs

The initial charges are $2 so the equation will be:

f(x) = 1.29x+2

To find the cost of 30 songs, we have to put x= 30

So,

= 1.29(30)+2\\=38.7+2\\=40.7

Hence,

The cost of downloading the app and downloading 30 songs is $40.7

Keywords: Functions, slope

Learn more about functions at:

  • brainly.com/question/9196410
  • brainly.com/question/9178881

#LearnwithBrainly

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Answer:

They will each have saved $70.

Jessica is saving at a faster rate than Raphael.

The rate at which Jessica is adding to her savings is $4 per week more than the rate at which Raphael is adding to his savings.

Step-by-step explanation:

The formula for Jessica’s savings is

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She is saving at the rate of $10/wk .

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=====

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=====

Jessica is saving at a faster rate than Raphael.

She is saving at the rate of $10/wk, while he is saving at the rate of $6/wk.

The rate at which Jessica is adding to her savings is $4/wk more than the rate at which Raphael is adding to his savings.

The red line in the graph shows that Jessica starts with $20. After five weeks, she has caught up to Raphael, who also has $70 after five weeks.  

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