Juana, Anish, and Giselle are comparing their solutions to the inequality 5/6x≤−10.

Juana says that the inequality symbol must be reversed because there is a negative sign in the inequality. Anish says the Multiplication Property of Inequality or Division Property of Inequality must be applied. Giselle says the inequality symbol must stay the same.

Based on these answers, which combination of people is correct?

1 answer

To solve the inequality \( \frac{5}{6}x \leq -10 \), we need to isolate \( x \). Here are the steps involved:

  1. Multiply both sides by the reciprocal of \( \frac{5}{6} \), which is \( \frac{6}{5} \). Since \( \frac{6}{5} \) is positive, the direction of the inequality remains the same:

    \[ x \leq -10 \cdot \frac{6}{5} \]

    Calculating \( -10 \cdot \frac{6}{5} \):

    \[ -10 \cdot \frac{6}{5} = -12 \]

    So, after multiplying, we have:

    \[ x \leq -12 \]

Now, analyzing the statements from Juana, Anish, and Giselle:

  • Juana thinks the inequality symbol must be reversed because there is a negative sign in the inequality. This is incorrect because the direction of the inequality only reverses when you multiply or divide by a negative number. Since we multiplied by a positive number (the reciprocal of \( \frac{5}{6} \)), the inequality remains the same.

  • Anish correctly mentions that the Multiplication Property of Inequality or Division Property of Inequality must be applied. This is true because we used the multiplication property to solve for \( x \).

  • Giselle says the inequality symbol must stay the same. This is correct as well, since we did not multiply or divide by a negative number.

Therefore, the correct combination of people is:

  • Anish and Giselle are correct.
  • Juana is incorrect.