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tamaranim1 [39]
3 years ago
6

Janie receives an allowance of $3 per week. In addition, she can earn $2 for each chore she does. This week, she wants to earn e

nough money to buy a CD for $13. Janie can do fractions of chores.
Write an inequality to determine the number of chores, cc, Janie must do this week to earn enough money to buy a CD.
Mathematics
1 answer:
Harlamova29_29 [7]3 years ago
7 0

Answer:

n ≥ 5

Step-by-step explanation:

The money that Janie earns (E) must be greater than or equal to the cost (c) of the CD.

In symbols,

        E ≥ c

2n + 3 ≥ 13     Subtract 2 from each side

     2n ≥ 10      Divide each side by 2

       n ≥ 5

Janie must do five or more chores to buy the CD.

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Answer:   Width of box is not taken up by pencils =  2\dfrac58\text{ inches}

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Step-by-step explanation:

Given: Width of pencil box = 5\dfrac14\text{ inches}=\dfrac{21}{4}\text{ inches}

Width of seven pencils = 2\dfrac58\text{ inches}=\dfrac{16+5}{8}\text{ inches}=\dfrac{21}{8}\text{ inches}

Width of box is not taken up by pencils =  Width of pencil box  - Width of seven pencils

\left \{ {{y=2} \atop {x=2}} \right. \dfrac{21}{4}-\dfrac{21}{8}\\\\=\dfrac{21\times2-21}{8}\\\\=\dfrac{21}{8}\text{ inches}=2\dfrac58\text{ inches}

Width of box is not taken up by pencils =  2\dfrac58\text{ inches}

Width of each pencil = (Width of seven pencils ) ÷ 7

=\dfrac{21}{8}\div7\\\\=\dfrac{21}{8}\times\dfrac17\\\\=\dfrac38\text{ inches}

Width of each pencil =\dfrac38\text{ inches}

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Step-by-step explanation:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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<h3>Solution</h3>

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