A salesperson earns [tex]$450 per week plus 15% of her weekly sales. The expression representing her earnings is \(450 + 0.15x\). Which of the following describes the sales necessary for the salesperson to earn at least $[/tex]600 in one week?

A. [tex]\(x \geq 3000\)[/tex]
B. [tex]\(x \leq 1000\)[/tex]
C. [tex]\(x \geq 1000\)[/tex]
D. [tex]\(x \leq 3000\)[/tex]



Answer :

To determine the sales necessary for the salesperson to earn at least [tex]$600 in one week, we need to set up an inequality based on the given information: 1. The salesperson earns a fixed weekly salary of $[/tex]450.
2. The salesperson also earns an additional [tex]$15\%$[/tex] of her weekly sales.

We need to find the minimum sales [tex]\(x\)[/tex] such that her total earnings for the week are at least [tex]$600. The total weekly earnings can be expressed by the equation: \[ 450 + 0.15x \] We need this to be at least $[/tex]600:
[tex]\[ 450 + 0.15x \geq 600 \][/tex]

Subtract 450 from both sides of the inequality to isolate the term involving [tex]\(x\)[/tex]:
[tex]\[ 0.15x \geq 600 - 450 \][/tex]
[tex]\[ 0.15x \geq 150 \][/tex]

Now, divide both sides by 0.15 to solve for [tex]\(x\)[/tex]:
[tex]\[ x \geq \frac{150}{0.15} \][/tex]

Performing the division gives:
[tex]\[ x \geq 1000 \][/tex]

Therefore, the sales necessary for the salesperson to earn at least $600 in one week is [tex]\(x \geq 1000\)[/tex].

The correct answer is:
C. [tex]\(x \geq 1000\)[/tex]

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