Algebra Class 10: Inequalities
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Questions and Answers

What is the first step in solving the inequality $3x + 1 < \frac{4x}{5} + 3$ algebraically?

  • Convert $\frac{4x}{5}$ into a decimal
  • Multiply both sides by 5
  • Subtract $3x$ from both sides (correct)
  • Add 1 to both sides
  • What is the equivalent form of the inequality after simplifying $3x + 1 < \frac{4x}{5} + 3$?

  • $15x < 14$
  • $x < 4$
  • $5x + 1 < 4x + 15$
  • $-2x < 14$ (correct)
  • What is the solution in interval notation for the inequality $3x + 1 < \frac{4x}{5} + 3$?

  • (7, ∞)
  • (-∞, 7)
  • (-∞, 4) (correct)
  • (7, 4)
  • Which graphical representation accurately depicts the solution of $3x + 1 < \frac{4x}{5} + 3$?

    <p>An open circle at 4 with a line extending to $-∞$</p> Signup and view all the answers

    What occurs if both sides of the inequality $3x + 1 < \frac{4x}{5} + 3$ are multiplied by -1?

    <p>The inequality direction reverses</p> Signup and view all the answers

    Study Notes

    Inequality Problem Overview

    • Inequality: (3x + 1 < \frac{4x}{5} + 3)
    • Objective: Solve both algebraically and graphically.

    Algebraic Solution Steps

    • Start with the original inequality: (3x + 1 < \frac{4x}{5} + 3).
    • Eliminate the fraction by multiplying the entire inequality by 5: (15x + 5 < 4x + 15).
    • Rearrange to isolate (x): (15x - 4x < 15 - 5).
    • Simplify to: (11x < 10).
    • Divide by 11: (x < \frac{10}{11}).

    Interval Notation

    • The solution in interval notation: ((- \infty, \frac{10}{11})).

    Graphical Representation

    • Graph the solution on a number line.
    • Shade to the left of (\frac{10}{11}) indicating all values less than (\frac{10}{11}).
    • Use an open circle at (\frac{10}{11}) to denote that it's not included in the solution set.

    Possible Graph Options

    • Analyze and select the correct graph representation from given options (A through F).

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    Description

    This quiz focuses on solving inequalities algebraically and graphically. You will draw a number line graph of the solution and express it in interval notation. Test your understanding of these concepts with multiple answers to choose from.

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