11 - 20 of 47 Questions
# | Question | Ans |
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11. |
Factorize 2y2 - 15xy + 18x2 A. (2y - 3x) (y + 6x) B. (2y - 3x) (y - 6x) C. (2y + 3x) (y - 6x) D. (3y + 2x) (y - 6x) |
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12. |
Find the value of k if y - 1 is a factor of y3 + 4y2 + ky - 6 A. -6 B. -4 C. O D. 1 |
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13. |
y varies directly as w2. When y = 8, w = 2. Find y when w = 3 A. 18 B. 12 C. 9 D. 6 |
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14. |
P varies directly as Q and inversely as R. When Q = 36 and R = 16, P = 27. Find the relation between P, Q and R. A. \(P = \frac{Q}{12R}\) B. \(P = \frac{12Q}{R}\) C. \(P = 12QR\) D. \(P = \frac{12}{QR}\) |
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15. |
What is the solution of \(\frac{x - 5}{x + 3} < -1\)? A. -3 < x < 1 B. x < -3 or x > 1 C. -3 < x < 5 D. x < -3 or x > 5 |
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16. |
Evaluate the inequality \(\frac{x}{2} + \frac{3}{4} \leq \frac{5x}{6} - \frac{7}{12}\) A. \(x \geq 4\) B. \(x \leq 3\) C. \(x \geq -3\) D. \(x \leq -4\) |
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17. |
The 4th term of an A.P. is 13 while the 10th term is 31. Find the 24th term. A. 89 B. 75 C. 73 D. 69 |
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18. |
What is the common ratio of the G.P. \((\sqrt{10} + \sqrt{5}) + (\sqrt{10} + 2\sqrt{5}) + ... \)? A. \(\sqrt{2}\) B. \(\sqrt{5}\) C. 3 D. 5 |
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19. |
A binary operation * is defined by x * y = xy. If x * 2 = 12 - x, find the possible values of x A. 3,4 B. 3,-4 C. -3,4 D. -3,-4 |
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20. |
Find y, if \(\begin{pmatrix}5 & -6 \\2 & -7\end{pmatrix}\begin{pmatrix}x \\ y \end{pmatrix} = \begin{pmatrix}7 \\-11\end{pmatrix}\) A. 8 B. 5 C. 3 D. 2 Detailed Solution\(\begin{pmatrix}5 & -6 \\2 & -7\end{pmatrix}\begin{pmatrix} x \\ y \end{pmatrix} = \begin{pmatrix}7 \\-11\end{pmatrix}\)By matrices multiplication; 5x - 6y = 7 ........(1) 2x - 7y = -11 ......(2) 2 x (1): 10x - 12y = 14 .......(3) 5 x (2): 10x - 35y = -55 ......(4) (3) - (4): 23y = 69 y = 69/23 = 3 There is an explanation video available below. |
11. |
Factorize 2y2 - 15xy + 18x2 A. (2y - 3x) (y + 6x) B. (2y - 3x) (y - 6x) C. (2y + 3x) (y - 6x) D. (3y + 2x) (y - 6x) |
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12. |
Find the value of k if y - 1 is a factor of y3 + 4y2 + ky - 6 A. -6 B. -4 C. O D. 1 |
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13. |
y varies directly as w2. When y = 8, w = 2. Find y when w = 3 A. 18 B. 12 C. 9 D. 6 |
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14. |
P varies directly as Q and inversely as R. When Q = 36 and R = 16, P = 27. Find the relation between P, Q and R. A. \(P = \frac{Q}{12R}\) B. \(P = \frac{12Q}{R}\) C. \(P = 12QR\) D. \(P = \frac{12}{QR}\) |
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15. |
What is the solution of \(\frac{x - 5}{x + 3} < -1\)? A. -3 < x < 1 B. x < -3 or x > 1 C. -3 < x < 5 D. x < -3 or x > 5 |
16. |
Evaluate the inequality \(\frac{x}{2} + \frac{3}{4} \leq \frac{5x}{6} - \frac{7}{12}\) A. \(x \geq 4\) B. \(x \leq 3\) C. \(x \geq -3\) D. \(x \leq -4\) |
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17. |
The 4th term of an A.P. is 13 while the 10th term is 31. Find the 24th term. A. 89 B. 75 C. 73 D. 69 |
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18. |
What is the common ratio of the G.P. \((\sqrt{10} + \sqrt{5}) + (\sqrt{10} + 2\sqrt{5}) + ... \)? A. \(\sqrt{2}\) B. \(\sqrt{5}\) C. 3 D. 5 |
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19. |
A binary operation * is defined by x * y = xy. If x * 2 = 12 - x, find the possible values of x A. 3,4 B. 3,-4 C. -3,4 D. -3,-4 |
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20. |
Find y, if \(\begin{pmatrix}5 & -6 \\2 & -7\end{pmatrix}\begin{pmatrix}x \\ y \end{pmatrix} = \begin{pmatrix}7 \\-11\end{pmatrix}\) A. 8 B. 5 C. 3 D. 2 Detailed Solution\(\begin{pmatrix}5 & -6 \\2 & -7\end{pmatrix}\begin{pmatrix} x \\ y \end{pmatrix} = \begin{pmatrix}7 \\-11\end{pmatrix}\)By matrices multiplication; 5x - 6y = 7 ........(1) 2x - 7y = -11 ......(2) 2 x (1): 10x - 12y = 14 .......(3) 5 x (2): 10x - 35y = -55 ......(4) (3) - (4): 23y = 69 y = 69/23 = 3 There is an explanation video available below. |