This quiz works best with JavaScript enabled. Home > Grammar > Discourse > Substitution – Quiz 31 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Substitution Quiz 31 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Simplify $9c+5z+2$ A) 128. B) -124. C) -34. D) None of the above. Show Answer Correct Answer: C) -34. 2. Simplify $3b-\frac{-12}{r}$ A) -3. B) -9. C) 9. D) 3. Show Answer Correct Answer: B) -9. 3. Solve using substitution.y =-3x + 115x + y = 21 A) (1, -5). B) (1, 5). C) (-4, 5). D) (5, -4). Show Answer Correct Answer: D) (5, -4). 4. Using Substitution, solve for the following system of linear equations:$x=-2y-1$ $-6x=-2y+20$ A) (2, -2). B) (-3, 1). C) Infinitely many solutions. D) No solution. Show Answer Correct Answer: B) (-3, 1). 5. 10 + X = yIf X = 5, then Y = A) 10. B) 6. C) 15. D) None of the above. Show Answer Correct Answer: C) 15. 6. If d =-1 and b =-6, calculate db-b$^{2}$ A) -20. B) 18. C) -30. D) None of the above. Show Answer Correct Answer: C) -30. 7. What are delocalised electrons? A) Electrons that are not attached to any of the atoms in a molecule. B) Electrons that are shared between more than two atoms in a molecule. C) Electrons that are not attached to any one particular atom but free to move over all the atoms in a molecule. D) None of the above. Show Answer Correct Answer: B) Electrons that are shared between more than two atoms in a molecule. 8. $\int_{ }^{ }\sqrt{x^3-3x}\left(x^2-1\right)dx$ A) $\frac{2}{9}\left(x^3-3x\right)^{\frac{3}{2}}+C$. B) $\frac{2}{3}\left(x^3-3x\right)^{\frac{3}{2}}+C$. C) $\frac{3}{2}\left(x^3-3x\right)^{\frac{3}{2}}+C$. D) $\sqrt{x^3-3x}\left(2x\right)+C$. Show Answer Correct Answer: A) $\frac{2}{9}\left(x^3-3x\right)^{\frac{3}{2}}+C$. 9. Solve the system of linear equations using substitution. $\frac{1}{2}x+y=2$ $-x+y=2$ A) (0, 2). B) (2, 0). C) (0, 0). D) (0, -2). Show Answer Correct Answer: A) (0, 2). 10. Solve the system by substitution methodx = 32x + 5y = 16 A) (3, 2). B) (3, 0). C) (2, 5). D) (2, 10). Show Answer Correct Answer: A) (3, 2). 11. What is the solution to the system of equations:y= x+8 and x+y=2? A) (3, -5). B) No Solution. C) Infinite Solutions. D) (-3, 5). Show Answer Correct Answer: D) (-3, 5). 12. Solve the system by substitution.y = 4x-10y = 3x-5 A) (5, 10). B) (1, -5). C) (2, 1). D) (1, 2). Show Answer Correct Answer: A) (5, 10). 13. What is the type of reaction between chloromethane and ethanolic sodium hydroxide heated under reflux? A) Nucleophilic substitution. B) Elimination. C) Electrophilic addition. D) Electrophilic substitution. Show Answer Correct Answer: B) Elimination. 14. In electrophilic aromatic substitution reactions, a-CO$_{2}$H substituent on the aromatic ring is A) A deactivator and a m-director. B) A deactivator and an o, p-director. C) An activator and a m-director. D) ) an activator and an o, p-director. Show Answer Correct Answer: A) A deactivator and a m-director. 15. A person interested in reading books and nothing else A) Scholar. B) Book-keeper. C) Student. D) Book worm. Show Answer Correct Answer: D) Book worm. 16. In electrophilic aromatic substitution reactions, a-NHCOCH$_{3}$ substituent on the aromatic ring is A) A deactivator and a m-director. B) A deactivator and an o, p-director. C) An activator and a m-director. D) An activator and an o, p-director. Show Answer Correct Answer: D) An activator and an o, p-director. 17. Solve the system using elimination3x+y=-56x+2y=10 A) No Solution. B) Infinite Number of Solutions. C) (2, 3). D) (6, -2). Show Answer Correct Answer: A) No Solution. 18. Solve the system using substitution. $-5x-3y=14$ $x=-1$ A) (-1, -3). B) (-1, 3). C) (3, 1). D) (-3, -1). Show Answer Correct Answer: A) (-1, -3). 19. Work out the value of y + x-z when x = 3, y =-2 and z =-4. A) -5. B) -3. C) 3. D) 5. Show Answer Correct Answer: B) -3. 20. Evaluate f(-2) if f(x) = x$^{2}$+ 3 A) -1. B) 1. C) 7. D) -7. Show Answer Correct Answer: C) 7. 21. What step would I do second? (4-2) x 9 + 7 = A) Multiplication. B) Subtraction. C) Addition. D) Dividing. Show Answer Correct Answer: A) Multiplication. 22. What is the first step to solving this system of equations by substitution? x =-3y-17 2x + 3y =-7 A) 2(-3x-17) + 3x =-7. B) 2x + 3(-3x-17) =-7. C) 2(-3y-17) + 3y =-7. D) 2(3y + 17) + 3y =-7. Show Answer Correct Answer: C) 2(-3y-17) + 3y =-7. 23. If x = 7, calculate x-9 A) -2. B) 2. C) 3. D) None of the above. Show Answer Correct Answer: A) -2. 24. 3x + y = 1y = 4x + 1 A) (0, -1). B) No Solution. C) (0, 8). D) (0, 1). Show Answer Correct Answer: D) (0, 1). 25. What is the solution to this system?y= 4x + 32x-3y = 21 A) (3, -9). B) (-3, -9). C) (-3, 9). D) (0, 1). Show Answer Correct Answer: B) (-3, -9). ← PreviousNext →Related QuizzesGrammar QuizzesSubstitution Quiz 1Substitution Quiz 2Substitution Quiz 3Substitution Quiz 4Substitution Quiz 5Substitution Quiz 6Substitution Quiz 7Substitution Quiz 8Substitution Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books