Algebra Quiz: Class 9
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Questions and Answers

What is the value of $x$ in the equation $2x + 5 = 13$?

  • 4 (correct)
  • 3
  • 8
  • 6
  • Solve for $y$: $3y - 4 = 11$. What is the value of $y$?

  • 15
  • 3
  • 7 (correct)
  • 5
  • Which pair of values satisfies the equation $x^2 - 9 = 0$?

  • $x = 3$
  • $x = -3$ and $x = 3$ (correct)
  • $x = -9$ and $x = 9$
  • $x = 0$
  • What is the coefficient of $y$ in the expression $7y - 2x + 3$?

    <p>7</p> Signup and view all the answers

    If $x + 2 = 5$, what is the value of $x$?

    <p>1</p> Signup and view all the answers

    Solve the equation $5x - 2 = 3x + 6$. What is the value of $x$?

    <p>$x = 2$</p> Signup and view all the answers

    What is the value of $2x^2 - 3x + 4$ when $x = 2$?

    <p>14</p> Signup and view all the answers

    Factorize the quadratic expression: $x^2 + 4x + 3$.

    <p>$(x + 3)(x + 1)$</p> Signup and view all the answers

    Study Notes

    Algebra Concepts and Solutions

    • Solve for ( x ) in the equation ( 2x + 5 = 13 ): ( x = 4 )
    • Solve for ( y ) in ( 3y - 4 = 11 ): ( y = 5 )
    • The solutions of ( x^2 - 9 = 0 ) are ( x = -3 ) and ( x = 3 )
    • Simplify ( 4a + 3a - 5 ): results in ( 7a - 5 )
    • Solve for ( x ) in ( 2x - 7 = 5 ): ( x = 6 )
    • Evaluate ( 3x + 2 ) at ( x = -1 ): yields ( -1 )

    Quadratic Equations and Factorization

    • Solve the quadratic equation ( x^2 + 5x + 6 = 0 ): solutions are ( x = -2 ) and ( x = -3 )
    • Factor ( x^2 - 16 ): results in ( (x - 4)(x + 4) )

    Additional Algebraic Solutions

    • Solve ( 2x - \frac{1}{3} = 4 ): ( x = 5 )
    • Simplify ( 3(x + 4) - 2x ): results in ( x + 12 )

    Coefficients and Simple Equations

    • In ( 7y - 2x + 3 ), the coefficient of ( y ) is ( 7 )
    • Solve for ( x ) in ( x + 2 = 5 ): ( x = 3 )
    • Solve ( 4(x - 2) = 12 ): ( x = 5 )

    Simplifying Expressions

    • Simplify ( 2x^2 + 4x ): results in ( 2x(x + 2) )
    • Solve ( 5x - 2 = 3x + 6 ): ( x = 4 )
    • Solve ( 3(x - 2) = 2x + 6 ): ( x = 12 )

    Evaluating Expressions

    • Evaluate ( 2x^2 - 3x + 4 ) at ( x = 2 ): result is ( 10 )
    • Factor ( x^2 + 4x + 3 ): results in ( (x + 1)(x + 3) )

    Simplifying Differences of Polynomials

    • Simplify ( (3x^2 - x) - (2x^2 + x) ): results in ( x^2 - 2x )

    Slope of Lines

    • The slope of the line given by ( 2x - 3y = 6 ) is ( \frac{2}{3} ) when expressed in slope-intercept form.

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    Description

    Test your skills with this engaging algebra quiz designed for Class 9 students. It covers basic equations, solving for variables, and simplifying expressions. Challenge yourself with multiple-choice questions that enhance your understanding of algebra.

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