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Question 1 Report
Simplify \(\frac{^{n}P_{4}}{^{n}C_{4}}\)
Question 2 Report
Find the sum of the exponential series \(96 + 24 + 6 +...\)
Question 3 Report
Find the coordinates of the centre of the circle \(4x^{2} + 4y^{2} - 5x + 3y - 2 = 0\).
Question 4 Report
A particle is projected vertically upwards from a height 45 metres above the ground with a velocity of 40 m/s. How long does it take it to hit the ground? [Take g = \(10 ms^{-2}\)].
Question 5 Report
A particle of mass 2.5 kg is moving at a speed of 12 m/s. If a force of magnitude 10 N acts against it, find how long it takes to come to rest.
Question 6 Report
If \((x - 3)\) is a factor of \(2x^{3} + 3x^{2} - 17x - 30\), find the remaining factors.
If \((x - 3)\) is a factor of \(2x^{3} + 3x^{2} - 17x - 30\), then we can use long division or synthetic division to divide the polynomial by \((x - 3)\) and find the remaining factors.
Using long division, we have:
2x^2 + 9x + 10
------------------------
x - 3 | 2x^3 + 3x^2 - 17x - 30
- (2x^3 - 6x^2)
--------------
9x^2 - 17x
- (9x^2 - 27x)
-----------
10x - 30
- (10x - 30)
---------
0
The result of the division is \(2x^{2} + 9x + 10\), which is a quadratic polynomial. Therefore, the remaining factors are given by factoring this quadratic polynomial. We can factor it as follows:
\[2x^{2} + 9x + 10 = (2x + 5)(x + 2)\]Therefore, the complete factorization of \(2x^{3} + 3x^{2} - 17x - 30\) is:
\[2x^{3} + 3x^{2} - 17x - 30 = (x - 3)(2x + 5)(x + 2)\]So, the correct option is (2x + 5)(x + 2).
Question 9 Report
The mean and median of integers x, y, z and t are 5 and z respectively. If x < y < z < t and y = 4, find (x + t).
Question 10 Report
A binary operation ♦ is defined on the set R, of real numbers by \(a ♦ b = \frac{ab}{4}\). Find the value of \(\sqrt{2} ♦ \sqrt{6}\).
Question 11 Report
| Age(in years) | 1 - 5 | 6 - 10 | 11 - 15 |
| Frequency | 3 | 5 | 2 |
Calculate the standard deviation of the distribution.
Answer Details
Question 12 Report
Find the coefficient of \(x^{4}\) in the binomial expansion of \((1 - 2x)^{6}\).
Question 13 Report
The parallelogram PQRS has vertices P(-2, 3), Q(1, 4), R(2, 6) and S(-1,5). Find the coordinates of the point of intersection of the diagonals.
Question 14 Report
If \(a = \begin{pmatrix} 3 \\ 2 \end{pmatrix}\) and \(b = \begin{pmatrix} -3 \\ 5 \end{pmatrix}\), find a vector c such that \(4a + 3c = b\).
Question 15 Report
Find the equation of the line passing through (0, -1) and parallel to the y- axis.
Question 16 Report
Simplify \(8^{n} \times 2^{2n} \div 4^{3n}\)
Question 17 Report
If \(f(x) = \frac{1}{2 - x}, x \neq 2\), find \(f^{-1}(-\frac{1}{2})\).
Question 18 Report
Evaluate \(\lim \limits_{x \to 1} \frac{1 - x}{x^{2} - 3x + 2}\)
Question 19 Report
Given that \(\begin{pmatrix} 1 & -3 \\ 1 & 4 \end{pmatrix} \begin{pmatrix} -6 \\ P \end{pmatrix} = \begin{pmatrix} 3 \\ -26 \end{pmatrix}\), find the value of P.
Question 21 Report
Given that \((\sqrt{3} - 5\sqrt{2})(\sqrt{3} + \sqrt{2}) = p + q\sqrt{6}\), find q.
Answer Details
Question 22 Report
The area of a sector of a circle is 3\(cm^{2}\). If the sector subtends an angle of 1.5 radians at the centre, calculate the radius of the circle.
Question 23 Report
Two forces, each of magnitude 16 N, are inclined to each other at an angle of 60°. Calculate the magnitude of their resultant.
Answer Details
Question 24 Report
In a firing contest, the probabilities that Kojo and Kwame hit the target are \(\frac{2}{5}\) and \(\frac{1}{3}\) respectively. What is the probability that none of them hit the target?
Question 25 Report
A force of 32 N is applied to an object of mass m kg which is at rest on a smooth horizontal surface. If the acceleration produced is 8\(ms^{-2}\), find the value of m.
Question 26 Report
\(P = {x : 1 \leq x \leq 6}\) and \(Q = {x : 2 < x < 9}\) where \(x \in R\), find \(P \cap Q\).
Question 27 Report
Two functions f and g are defined by \(f : x \to 3x - 1\) and \(g : x \to 2x^{3}\), evaluate \(fg(-2)\).
Answer Details
Question 28 Report
ABCD is a square. Forces of magnitude 14N, 4N, 2N and \(2\sqrt{2} N\) act along the sides AB, BC, CD and DA respectively. Find in Newtons, the magnitude of the resultant of the forces.
Answer Details
Question 29 Report
Evaluate \(\log_{0.25} 8\)
Question 30 Report
Calculate, correct to one decimal place, the angle between 5i + 12j and -2i + 3j.
Question 31 Report
Find the coordinates of the point on the curve \(y = x^{2} + 4x - 2\), where the gradient is zero.
Answer Details
Question 32 Report
The mean age of n men in a club is 50 years. Two men aged 55 and 63 years left the club, and the mean age reduced by 1 year. Find the value of n.
Question 33 Report
Solve the inequality \(2x^{2} + 5x - 3 \geq 0\).
Question 34 Report
The equation of the line of best fit for variables x and y is \(y = 19.33 + 0.42x\), where x is the independent variable. Estimate the value of y when x = 15.
Question 35 Report
A committee of 4 is to be selected from a group of 5 men and 3 women. In how many ways can this be done if the chairman of the committee must be a man?
Question 36 Report
Which of the following is a singular matrix?
Question 37 Report
The roots of the equation \(2x^{2} + kx + 5 = 0\) are \(\alpha\) and \(\beta\), where k is a constant. If \(\alpha^{2} + \beta^{2} = -1\), find the values of k.
Question 39 Report
A lift moving upwards with a uniform acceleration of 5\(ms^{-2}\) carries a body of mass p kg. If the reaction on the floor is 480 N, find the value of p. [Take g = \(10 ms^{-2}\)].
Answer Details
Question 40 Report
A and B are two independent events such that \(P(A) = \frac{2}{5}\) and \(P(A \cap B) = \frac{1}{15}\). Find \(P(B)\).
Answer Details
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