Iris has 120 songs on her playlist. each week, she downloads 4 new songs. Write an expression to show the total number of songs on Iris’s playlist after ‘w’ weeks.. (Help please!)

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Question:

Iris has 120 songs on her playlist. each week, she downloads 4 new songs. Write an expression to show the total number of songs on Iris’s playlist after ‘w’ weeks.. (Help please!)

Answer:

The expression that shows the total number of songs on Iris playlist is 120 + 4w

A linear expression is an expression that has only one variable. The single variable is raised to the power of 1.  An example of a linear expression is x + 10  

Iris already has 120 songs on her playlist. She increases her playlist every week by four songs.

This means that each week, her playlist increases by 4. This can be represented with the expression : 4 x w = 4w

Where w represents the number of weeks.

In week 10, her playlist increases by: 4 x 1 = 4 songs

In week 10, her playlist increases by : 4 x 10 = 40 songs

But Iris already has 120 songs

This can be represented with the expression 120 + 4w

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After 1 week, the total songs she would have is 120 + 4 = 124 songs

After 10 weeks, the total songs she would have is 120 + 40 = 160 songs

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