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3 years ago

9

Janie has $3. She earns $1.20 for each chore she does and can do fractions of chores. She wants to earn enough money to buy a CD

for $13.50.
1. Write an inequality to determine the number of chores, c, Janie could do to have enough money to buy the CD.

2. Graph the solution set to this inequality.

2 answers:

il63 [147K]3 years ago

4 0

Answer: x ≥ 9

Step-by-step explanation:

Janie has an initial amount of $3, and she earns other $1.20 for each chore, so the equation is:

Money = $3 + x*$1.20

where x is the number of chores.

She wants to earn at least $13.50 to buy a CD, so the equation we need to solve is:

$3 + x*$1.20 ≥ $13.50

we need to solve it:

x*$1.20 ≥ $10.50

x ≥ 10.50/1.20 = 8.75

So x must be greater than 8.75, but we can not have a 0.75 of a chore, so we have that the minimum value of x can be 9.

x ≥ 9

The graph of this set of solutions is a point in the 9 in the number line, and all the numbers bigger than 9.

podryga [215]3 years ago

3 0

I did that problem for homework. The picture shows my answers.

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