Gr 10 Math Ch 2 SUM: Exponents, Equations and Inequalities
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Questions and Answers

What must be done to both sides of a linear inequality when dividing by a negative number?

  • The inequality sign must be switched. (correct)
  • The inequality sign remains the same.
  • Both sides must be multiplied by the negative number.
  • You can ignore the inequality sign.
  • What is the first step to take when the unknown variable is in the denominator of the equation?

  • Divide both sides by the variable in the denominator.
  • Rearrange the equation to eliminate the denominator.
  • Multiply both sides by the lowest common denominator. (correct)
  • Add both sides by the other side of the equation.
  • Which of the following is a valid linear inequality?

  • $2x + 1 ext{ is greater than } 3$
  • $x^2 + 3 eq 5$
  • $3x - 4 ext{ less than or equal to } 5x + 1$
  • 5x + 2 < 7 (correct)
  • In the inequality $ rac{4}{3}x - 6 < 7x + 2$, what is the initial operation needed to isolate x?

    <p>Subtract 7x from both sides.</p> Signup and view all the answers

    What can be concluded if an inequality simplifies to a false statement, such as 6 < 2?

    <p>The original inequality has no solution.</p> Signup and view all the answers

    What is the result of simplifying the expression $a^3 imes a^4$?

    <p>$a^{7}$</p> Signup and view all the answers

    What is the simplified form of $ rac{a^5}{a^2}$?

    <p>$a^{3}$</p> Signup and view all the answers

    According to the laws of exponents, what is $(xy)^3$ equal to?

    <p>$x^3y^3$</p> Signup and view all the answers

    What is the value of $a^0$ when $a eq 0$?

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

    What is $a^{-3}$ equal to?

    <p>$ rac{1}{a^3}$</p> Signup and view all the answers

    How do you simplify the expression $ rac{(ab)^2}{(a^2b^2)}$?

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

    What does the expression $( rac{a}{b})^2$ become?

    <p>$ rac{a^2}{b^2}$</p> Signup and view all the answers

    What is the greatest common factor (GCF) of the expression $a^4 + a^3$?

    <p>$a^3$</p> Signup and view all the answers

    What is the first step for solving a quadratic equation?

    <p>Rewrite the equation in standard form</p> Signup and view all the answers

    In the factorisation method for solving quadratic equations, what is the purpose of setting each factor equal to zero?

    <p>To solve for the variable</p> Signup and view all the answers

    When solving simultaneous equations by substitution, what is the first step?

    <p>Express one variable in terms of the other</p> Signup and view all the answers

    What is a necessary condition for solving simultaneous equations?

    <p>There must be an equal number of equations and variables</p> Signup and view all the answers

    Which method involves adding or subtracting two equations to eliminate a variable?

    <p>Elimination method</p> Signup and view all the answers

    What step is NOT part of solving word problems using algebra?

    <p>Investigating similar problems</p> Signup and view all the answers

    What does a literal equation represent?

    <p>An equation defining relationships between several variables</p> Signup and view all the answers

    Which operation should be performed to isolate an unknown variable in a literal equation?

    <p>Perform the opposite operation for each term</p> Signup and view all the answers

    What is the graphical solution to simultaneous equations?

    <p>The intersection of the two graphs</p> Signup and view all the answers

    What is the last step in the process of solving quadratic equations?

    <p>Check the solution</p> Signup and view all the answers

    What is the result of multiplying $a^{2/3}$ by $a^{4/5}$?

    <p>a^{22/15}</p> Signup and view all the answers

    How would you simplify $ rac{a^{3/4}}{a^{5/6}}$?

    <p>a^{(3/4 - 5/6)}</p> Signup and view all the answers

    Which of the following is the correct application of the power of a power property?

    <p>(a^{1/2})^{1/3} = a^{1/6}</p> Signup and view all the answers

    What is the value of $x$ in the equation $2^x = 32$?

    <p>5</p> Signup and view all the answers

    When solving the exponential equation $3^x = 81$, which method would best apply?

    <p>Setting the exponents equal after writing as $3^x = 3^4$</p> Signup and view all the answers

    What is the highest exponent of the variable in a linear equation?

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

    What is a possible scenario in a quadratic equation?

    <p>It has just one solution.</p> Signup and view all the answers

    Which step is NOT part of solving a linear equation?

    <p>Set exponents equal</p> Signup and view all the answers

    In what condition can logarithms be used to solve exponential equations?

    <p>When bases are not easily made the same</p> Signup and view all the answers

    What is the result of simplifying $(xy)^{1/2}$?

    <p>x^{1/2} * y^{1/2}</p> Signup and view all the answers

    What is the first step when solving a quadratic equation using factorisation?

    <p>Rewrite the equation in standard form</p> Signup and view all the answers

    Which method involves expressing one variable in terms of the other?

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

    What ensures that a quadratic equation is balanced during manipulation?

    <p>Perform the same operation on both sides</p> Signup and view all the answers

    In solving simultaneous equations graphically, what does the solution represent?

    <p>The coordinates of intersection points</p> Signup and view all the answers

    What is one way to check the correctness of a solution to a quadratic equation?

    <p>Substitute the solution back into the original equation</p> Signup and view all the answers

    When solving a literal equation, what should you do to isolate the unknown variable?

    <p>Change the subject of the formula</p> Signup and view all the answers

    Which statement best describes simultaneous equations?

    <p>They require two equations for two unknown variables</p> Signup and view all the answers

    What is a key consideration when writing equations to solve word problems?

    <p>Translate words into expressions</p> Signup and view all the answers

    In the elimination method for solving simultaneous equations, what is the goal?

    <p>Eliminate one variable by making coefficients equal</p> Signup and view all the answers

    What must you remember when isolating a variable by taking a square root?

    <p>Both positive and negative solutions must be considered</p> Signup and view all the answers

    Which expression correctly simplifies according to the laws of exponents?

    <p>$a^5 \times a^2 = a^7$</p> Signup and view all the answers

    What is the result of applying the negative exponent law to the expression $a^{-3}$?

    <p>$\frac{1}{a^3}$</p> Signup and view all the answers

    Which of the following represents the correct application of the division law of exponents?

    <p>$\frac{a^{-2}}{a^3} = a^{-5}$</p> Signup and view all the answers

    When simplifying the expression $(ab)^4$, what is the resulting form?

    <p>$a^4 b^4$</p> Signup and view all the answers

    How can the expression $\frac{(xy)^3}{x^2 y^3}$ be simplified?

    <p>$x^{3-2} y^{3-3}$</p> Signup and view all the answers

    What is the simplified form of the expression [\frac{6a^4b^2}{3a^2b}]?

    <p>$2a^2b$</p> Signup and view all the answers

    Which expression represents the difference of squares correctly?

    <p>$a^2 - b^2 = (a - b)(a + b)$</p> Signup and view all the answers

    What is the significance of applying the zero exponent law?

    <p>$a^0 = 1$ for any $a \neq 0$</p> Signup and view all the answers

    What is the correct expression for raising a product to a power according to the laws of rational exponents?

    <p>(ab)^{m/n} = a^{m/n} b^{m/n}</p> Signup and view all the answers

    Which method is used to solve exponential equations when the bases cannot be made the same?

    <p>Using logarithms</p> Signup and view all the answers

    What does the equation $a^{m/n} imes a^{p/q}$ simplify to based on the multiplication of exponents rule?

    <p>a^{m/n + p/q}</p> Signup and view all the answers

    What must be done first to solve a linear equation?

    <p>Expand all brackets</p> Signup and view all the answers

    When can it be concluded that $x = y$ in the context of exponential equations?

    <p>When $a^x = a^y$ and $a &gt; 0$, $a eq 1$</p> Signup and view all the answers

    How many solutions can a quadratic equation typically have?

    <p>At most two solutions</p> Signup and view all the answers

    In the power of a power property, how is $(a^{m/n})^{p/q}$ expressed?

    <p>a^{mp/nq}</p> Signup and view all the answers

    What operation should be performed to isolate the variable when solving a linear equation?

    <p>Add or subtract constant terms</p> Signup and view all the answers

    To simplify a rational exponent such as $ rac{a^{3/4}}{a^{5/6}}$, what should be done with the exponents?

    <p>Subtract the exponents: $3/4 - 5/6$</p> Signup and view all the answers

    What must be done first when solving the inequality $ rac{3x + 1}{2} geq 4$?

    <p>Multiply both sides by 2</p> Signup and view all the answers

    Which inequality correctly represents the result of dividing both sides of $8 > 6$ by -2?

    <p>$-4 &lt; -3$</p> Signup and view all the answers

    In the inequality $2 - x geq 3$, what is the correct first operation to isolate $x$?

    <p>Subtract 2 from both sides</p> Signup and view all the answers

    When manipulating the inequality $ rac{4}{3}x - 6 < 7x + 2$, what initial step is required?

    <p>Multiply all terms by 3</p> Signup and view all the answers

    What is the correct interpretation if an equation like $6 < 2$ results from solving a linear inequality?

    <p>The inequality has no solutions</p> Signup and view all the answers

    What must be done to both sides when solving the inequality $2 - x \geq 3$?

    <p>Subtract 2 from both sides</p> Signup and view all the answers

    When a linear inequality such as $\frac{3x + 1}{2} \geq 4$ is presented, what is the first step to solve it?

    <p>Multiply both sides by 2</p> Signup and view all the answers

    In solving the inequality $\frac{4}{3}x - 6 < 7x + 2$, what should be done first to isolate x?

    <p>Subtract 7x from both sides</p> Signup and view all the answers

    What is true about the operation performed on both sides of the inequality when dividing by a negative number?

    <p>The inequality sign must be switched</p> Signup and view all the answers

    For the inequality $8 > 6$, what happens if both sides are divided by -2?

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

    What does the expression $a^{-n}$ equal to?

    <p>$ rac{1}{a^n}$</p> Signup and view all the answers

    When simplifying the expression $a^5 imes a^2$, what is the result?

    <p>$a^{7}$</p> Signup and view all the answers

    To simplify $( rac{3}{2})^3$, which law of exponents should be applied?

    <p>Power of a Quotient</p> Signup and view all the answers

    What is the simplified result of the expression $ rac{a^4 imes a^3}{a^5}$?

    <p>$a^{1}$</p> Signup and view all the answers

    Which expression correctly applies the law of exponents to simplify $(a^2b^3)^2$?

    <p>$a^{4}b^{6}$</p> Signup and view all the answers

    What is the outcome when simplifying the expression $ rac{(ab)^4}{a^2b^3}$?

    <p>$a^{2}b^{1}$</p> Signup and view all the answers

    What does the zero exponent law state?

    <p>$a^0 = 1$</p> Signup and view all the answers

    When applying the law of exponents, what is true about raising a number to a negative exponent?

    <p>It is equivalent to taking the reciprocal.</p> Signup and view all the answers

    How can the expression $a^{1/2} imes a^{3/4}$ be simplified?

    <p>$a^{5/4}$</p> Signup and view all the answers

    What is the result when the expression $( rac{2}{3})^{1/2}$ is simplified?

    <p>$ rac{2^{1/2}}{3^{1/2}}$</p> Signup and view all the answers

    If $2^x = 2^5$, what can be concluded about the variable $x$?

    <p>$x = 5$</p> Signup and view all the answers

    When solving the equation $3^{x} = 27$, which approach is most useful?

    <p>Convert $27$ to the same base as $3$ before equating exponents.</p> Signup and view all the answers

    Which of the following shows the correct method for simplifying the expression $ rac{a^{5/6}}{a^{1/3}}$?

    <p>$a^{(5/6) - (1/3)}$</p> Signup and view all the answers

    What is the characteristic of a quadratic equation?

    <p>It can have two or more solutions.</p> Signup and view all the answers

    Which of the following options illustrates the power of a power property incorrectly?

    <p>$ig(a^{p}ig)^{m/n} = a^{p/m+n}$</p> Signup and view all the answers

    If an exponential equation simplifies to $4 < 2$ after manipulation, what does it indicate?

    <p>There are no solutions.</p> Signup and view all the answers

    Which method should be used to solve the equation $x^2 - 5x + 6 = 0$?

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

    When solving linear equations, what should be done first?

    <p>Rearranging the terms.</p> Signup and view all the answers

    What is the correct order of operations when rewriting a quadratic equation for factorisation?

    <p>Rewrite it in standard form, then factorise, and finally solve for x.</p> Signup and view all the answers

    What does substituting into the second equation achieve when solving simultaneous equations by substitution?

    <p>It reduces the problem to one equation with one variable.</p> Signup and view all the answers

    What must be ensured when performing operations on one side of a quadratic equation?

    <p>The equation must remain balanced on both sides.</p> Signup and view all the answers

    What is the main goal of using the elimination method in solving simultaneous equations?

    <p>To make the coefficients of one variable the same.</p> Signup and view all the answers

    When solving a literal equation, what is the first action to isolate the unknown variable?

    <p>Perform the opposite operation of what is applying to the variable.</p> Signup and view all the answers

    Which step is NOT part of the problem-solving strategy for word problems?

    <p>Finding all possible solutions regardless of constraints.</p> Signup and view all the answers

    What is the graphical solution to simultaneous equations visually represented as?

    <p>The point where the graphs of the equations intersect.</p> Signup and view all the answers

    Why is checking the solution important after solving a quadratic equation?

    <p>To verify that the solution satisfies the original equation.</p> Signup and view all the answers

    When rearranging a literal equation, what must be considered about the terms containing the unknown variable?

    <p>They should be factored out if in multiple terms.</p> Signup and view all the answers

    What role does dividing by common factors play in solving a quadratic equation?

    <p>It helps simplify the equation if applicable.</p> Signup and view all the answers

    What must occur to the inequality sign when both sides of a linear inequality are multiplied by a negative number?

    <p>It should always flip to the opposite direction.</p> Signup and view all the answers

    When solving the inequality \[\frac{3x + 1}{2} \geq 4\, what is the first step to isolate x?

    <p>Multiply both sides by 2.</p> Signup and view all the answers

    Which of the following inequalities can be solved using the same methods as linear equations?

    <p>[2 - x \geq 3]</p> Signup and view all the answers

    In the expression \[\frac{4}{3}x - 6 < 7x + 2\, which operation will help isolate x after initial simplification?

    <p>Subtracting 4/3x from both sides.</p> Signup and view all the answers

    What can be concluded if an inequality leads to a true statement such as [4 < 5]?

    <p>The inequality has infinitely many solutions.</p> Signup and view all the answers

    Using the multiplication of exponents, what is the result of simplifying the expression $a^5 \times a^{-3}$?

    <p>$a^{2}$</p> Signup and view all the answers

    What is the simplified form of the expression $(\frac{3}{4})^{-2}$?

    <p>$\frac{16}{9}$</p> Signup and view all the answers

    After applying the power of a power property, what is the simplified expression for $(a^2)^3$?

    <p>$a^6$</p> Signup and view all the answers

    What is the correct application of the zero exponent law for the expression $b^0$?

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

    Which of the following represents the correct result of applying the division law of exponents to simplify $a^{10}/a^{4}$?

    <p>$a^6$</p> Signup and view all the answers

    What will be the result of simplifying the expression $\left(\frac{2a}{3b}\right)^{2}$?

    <p>$\frac{4a^2}{9b^2}$</p> Signup and view all the answers

    Applying the prime factorization method, how can the expression $a^4b^2c$ be rewritten?

    <p>$(ab^2)(a^2)$</p> Signup and view all the answers

    What is the result of the expression $\frac{a^5b^3}{a^2b^2}$ when simplified?

    <p>$a^3b$</p> Signup and view all the answers

    When solving a quadratic equation by factorisation, what is the correct first step?

    <p>Rewrite the equation in standard form</p> Signup and view all the answers

    In solving simultaneous equations using the elimination method, which action is taken first?

    <p>Add or subtract the equations to eliminate a variable</p> Signup and view all the answers

    What is the main goal when solving word problems using algebra?

    <p>To write equations that represent a mathematical model of the situation</p> Signup and view all the answers

    What is a crucial step to take when solving simultaneous equations graphically?

    <p>Determine the point of intersection of the graphs</p> Signup and view all the answers

    What is typically true about the variables in a literal equation?

    <p>They can include multiple variables and constants</p> Signup and view all the answers

    During the factorisation of a quadratic equation, what form should the expression be turned into?

    <p>A product of linear factors</p> Signup and view all the answers

    What operation must be performed to each side of a literal equation to isolate a variable?

    <p>Perform the same operation consistently</p> Signup and view all the answers

    What must be ensured for a quadratic equation before applying the factorisation method?

    <p>The equation should be of the form $ax^2 + bx + c = 0$</p> Signup and view all the answers

    Which method can be utilized to solve systems of equations without manipulating the equations algebraically?

    <p>Graphical method</p> Signup and view all the answers

    What is the result of simplifying the expression $a^{3/4} \times a^{5/6}$ using the laws of exponents?

    <p>$a^{19/24}$</p> Signup and view all the answers

    When rewriting the expression $\left(\frac{a}{b}\right)^{3/4}$, what is the corresponding fractional exponent representation?

    <p>$\frac{a^{3/4}}{b^{3/4}}$</p> Signup and view all the answers

    What is the value of $x$ in the equation $2^{2x} = 8$?

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

    Which of the following represents the correct application of the power of a power property when simplifying $\left(a^{2/3}\right)^{4/5}$?

    <p>$a^{8/15}$</p> Signup and view all the answers

    In solving the equation $3^{2x} = 27$, what method is most suitable?

    <p>Equating exponents</p> Signup and view all the answers

    How can the expression $\frac{(xy)^{3/2}}{x^{1/2}y^{1/2}}$ be simplified?

    <p>$x^{1/2}y^{1}$</p> Signup and view all the answers

    Which expression correctly simplifies according to the laws of exponents?

    <p>$a^{m/n + p/q}$</p> Signup and view all the answers

    Which of the following scenarios represents a quadratic equation?

    <p>$x^2 - 5x + 6 = 0$</p> Signup and view all the answers

    What is the highest exponent of the variable in an effective quadratic equation?

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

    Which step is essential for checking the solution of an equation?

    <p>Verification in the original equation</p> Signup and view all the answers

    When solving the inequality $2 - x \geq 3$, what is the first step to isolate x?

    <p>Subtract 2 from both sides.</p> Signup and view all the answers

    In the inequality $\frac{3x + 1}{2} \geq 4$, which operation must be performed to eliminate the fraction?

    <p>Multiply both sides by 2.</p> Signup and view all the answers

    What must be done to the inequality sign when dividing both sides of $8 > 6$ by -2?

    <p>Switch the sign to $\ ext{&lt;}$.</p> Signup and view all the answers

    What type of inequality does the expression $\frac{4}{3}x - 6 < 7x + 2$ represent?

    <p>Linear inequality with multiple terms on both sides.</p> Signup and view all the answers

    What is a potential outcome if an inequality simplifies to a statement like $6 < 2$?

    <p>The inequality has no solution.</p> Signup and view all the answers

    What is the primary purpose of rewriting a quadratic equation in the form $ax^2 + bx + c = 0$?

    <p>To prepare it for factorisation.</p> Signup and view all the answers

    Which of the following accurately describes the elimination method for solving simultaneous equations?

    <p>It requires making the coefficients of one variable equal and then eliminating it.</p> Signup and view all the answers

    When solving word problems, which initial step is the most critical?

    <p>Read the question thoroughly to understand the requirements.</p> Signup and view all the answers

    In what way can literal equations be effectively solved?

    <p>By isolating the unknown variable and then manipulating the equation appropriately.</p> Signup and view all the answers

    What do you need to ensure when solving a quadratic equation through factorisation?

    <p>The equation must remain balanced after each operation.</p> Signup and view all the answers

    When applying substitution in simultaneous equations, which stage follows after expressing one variable in terms of the other?

    <p>Use the newly formed expression in the second equation.</p> Signup and view all the answers

    Which graphical representation best defines the solution to simultaneous equations?

    <p>The coordinates of the point where the two graphs intersect.</p> Signup and view all the answers

    In the context of word problems, what does assigning a variable primarily achieve?

    <p>It transforms qualitative information into a quantitative format.</p> Signup and view all the answers

    What is a vital consideration when rearranging literal equations?

    <p>The unknown variable must be isolated through inverse operations.</p> Signup and view all the answers

    What is the outcome of applying the power of a power rule to the expression $\left(a^{2/3}\right)^{4/5}$?

    <p>$a^{8/15}$</p> Signup and view all the answers

    When simplifying the expression $\frac{a^{3/4}}{a^{1/2}}$, what is the resulting exponent of $a$?

    <p>$a^{1/4}$</p> Signup and view all the answers

    Which equation can be solved by equating exponents if $4^{x+1} = 16^{2-x}$?

    <p>$4^{x+1} = 4^{4-2x}$</p> Signup and view all the answers

    If $\frac{(x+2)^{1/3}}{(x-3)^{1/4}} = 1$, what condition must $x$ satisfy?

    <p>$(x + 2)^{4} = (x - 3)^{3}$</p> Signup and view all the answers

    What is the key property of logarithms used to solve the equation $5^{2x} = 25^{x-1}$?

    <p>Logarithms facilitate exponent isolation</p> Signup and view all the answers

    What is the correct simplification of the expression $\frac{(ab)^{2}}{a^{1}b^{3}}$?

    <p>$a^{1}b^{-1}$</p> Signup and view all the answers

    What is the maximum number of solutions for a quadratic equation?

    <p>2</p> Signup and view all the answers

    Which operation should be performed to both sides when isolating the variable $x$ in the equation $2^{x} = 8$?

    <p>Take the logarithm of both sides</p> Signup and view all the answers

    If $x^{2} + 5x + 6 = 0$, how can this quadratic equation be solved?

    <p>By factoring $(x+3)(x+2) = 0$</p> Signup and view all the answers

    What is a valid reason for using the method of substitution when solving simultaneous equations?

    <p>To eliminate one variable in an equation</p> Signup and view all the answers

    What is the result of simplifying the expression $a^5 imes a^{-2}$?

    <p>$a^{3}$</p> Signup and view all the answers

    How should the expression $a^2b^3 imes a^3b^{-1}$ be simplified?

    <p>$a^{5}b^{2}$</p> Signup and view all the answers

    What is the result of applying the power of a power property to the expression $(a^2)^3$?

    <p>$a^6$</p> Signup and view all the answers

    Which of the following correctly applies the division law of exponents to the expression $ rac{b^4}{b^2}$?

    <p>$b^{2}$</p> Signup and view all the answers

    How can the expression $ rac{(3x^2y)^3}{3^2x^3y^3}$ be simplified?

    <p>$3x^{-1}y^{-1}$</p> Signup and view all the answers

    What does the expression $( rac{a^2}{b^3})^4$ simplify to?

    <p>$ rac{a^{8}}{b^{12}}$</p> Signup and view all the answers

    Which of the following represents the correct application of the zero exponent law for the expression $c^0$?

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

    What is the simplified form of the expression $a^{-2} imes a^5$?

    <p>$a^{3}$</p> Signup and view all the answers

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