KCSE MATHEMATICS QUESTIONS AND SOLUTIONS ~ Topically Analyzed
Form 4 Mathematics
The table below shows the values of the length X ( in metres ) of a pendulum and the corresponding values of the period T ( in seconds) of its oscillations obtained in an experiment.
(a) Construct a table of values of log X and corresponding values of log T,
correcting each value to 2 decimal places (b) Given that the relation between the values of log X and log T approximate to a linear law of the form m log X + log a where a and b are constants (i) Use the axes on the grid provided to draw the line of best fit for the graph of log T against log X.
(ii) Use the graph to estimate the values of a and b
(b) Find, to decimal places the length of the pendulum whose period is 1 second
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Form 4 Mathematics
A company is considering installing two types of machines. A and B. The information about each type of machine is given in the table below.
The company decided to install x machines of types A and y machines of type B(a) Write down the inequalities that express the following conditions
I. The number of operators available is 40 II. The floor space available is 80m2 III. The company is to install not less than 3 type of A machine IV. The number of type B machines must be more than one third the number of type A machines (b) On the grid provided, draw the inequalities in part ( a) above and shade the unwanted region (c) Draw a search line and use it to determine the number of machines of each type that should be installed to maximize the daily profit. Form 4 Mathematics
Two places A and B are on the same circle of latitude north of the equator. The longitude of A is 1180W and the longitude of B is 1330E. The shorter distance between A and B measured along the circle of latitude is 5422 nautical miles.Find, to the nearest degree, the latitude on which A and B lie
Form 4 Mathematics
A particle moves in a straight line through a point P. Its velocity v m/s is given by v= 2 -1, where t is time in seconds, after passing P. The distance s of the particle from P when t = 2 is 5 metres. Find the expression for s in terms of t.
Form 4 Mathematics
The diagram on the grid below represents as extract of a survey map showing two adjacent plots belonging to Kazungu and Ndoe.
The two dispute the common boundary with each claiming boundary along different smooth curves coordinates ( x, y) and (x, y2) in the table below, represents points on the boundaries as claimed by Kazungu Ndoe respectively.
(a) On the grid provided above draw and label the boundaries as claimed by Kazungu and Ndoe
Form 4 Mathematics
(b) In a certain week a businessman bought 36 bicycles and 32 radios for total of Kshs 227 280. In the following week, he bought 28 bicycles and 24 radios for a total of Kshs 174 960
Using matrix method, find the price of each bicycle and each radio that he bought (c) In the third week, the price of each bicycle was reduced by 10% while the price of each radio was raised by 10%. The businessman bought as many bicycles and as many radios as he had bought in the first two weeks. Find by matrix method, the total cost of the bicycles and radios that the businessman bought in the third week. Form 4 MathematicsSolve the equation 4 sin2 Ө+4 cos Ө =5 For 0o ≤ Ө ≥ 360o give the answer in degrees Form 4 Mathematics
The gradient of the tangent to the curve y = ax3 + bx at the point ( 1,1) is -5
Calculate the values of a and b Form 4 Mathematics
The diagram below shows a sketch of the line y = 3x and the curve y = 4 – x2 intersecting at points P and Q.
a) Find the coordinates of P and Q
(b) Given that QN is perpendicular to the x- axis at N, calculate (i) The area bounded by the curve y = 4 – x2, the x- axis and the line QN (ii) The area of the shaded region that lies below the x- axis (iii)The area of the region enclosed by the curve y = 4-x2, the line y – 3x and the y axis Form 4 Mathematics
Mwanjoki flying company operates a flying service. It has two types of aeroplanes. The smaller one uses 180 litres of fuel per hour while the bigger one uses 300 litres per hour.
The fuel available per week is 18,000 litres. The company is allowed 80 flying hours per week while the smaller aeroplane must be flown for y hours per week. (a) Write down all the inequalities representing the above information (b) On the grid provided on page 21, draw all the inequalities in a) above by shading the unwanted regions (c) The profits on the smaller aeroplane is Kshs 4000 per hour while that on the bigger one is Kshs 6000 per hour Use the graph drawn in (b) above to determine the maximum profit that the company made per week. Form 4 Mathematics
Triangle ABC is shown on the coordinates plane below
(a) Given that A (-6, 5) is mapped onto A (6,-4) by a shear with y- axis invariant
(i) draw triangle A"B"B", the image of triangle ABC under the shear (ii) Determine the matrix representing this shear (b) Triangle A B C is mapped on to A" B" C" by a transformation defined by the matrix (1 1) (i) Draw triangle A" B" C" (ii) Describe fully a single transformation that maps ABC onto A"B" C" Form 4 Mathematics
Two places P and Q are at ( 360N, 1250W) and 360N, 1250W) and 360 N, 1250W) and 360 N, 550E) respectively. Calculate the distance in nautical miles between P and Q measured along the great circle through the North pole.
Form 4 Mathematics
A particle moving in a straight line passes through a fixed point O with a velocity of 9m/s. The acceleration of the particle, t seconds after passing through O is given by a = ( 10 – 2t) m/s2.Find the velocity of the particle when t – 3 seconds
Form 4 MathematicsForm 4 Mathematics
A particle moves along straight line such that its displacement S metres from a given point is S = t3 – 5t2 + 4 where t is time in seconds
Find
(a) the displacement of particle at t = 5 (b) the velocity of the particle when t = 5 (c) the values of t when the particle is momentarily at rest (d) The acceleration of the particle when t = 2 Form 4 Mathematics
Bot juice Company has two types of machines, A and B, for juice production. Type A machine can produce 800 litres per day while type B machine produces 1,600 litres per day.
Type A machine needs 4 operators and type B machine needs 7 operators. At least 8,000 litres must be produced daily and the total number of operators should not exceed 41. There should be 2 more machines of each type. Let x be the number of machines of type A and Y the number of machines for type B,
Form 4 MathematicsThe displacement x metres a particle after seconds given by:
x = t3- 2t2 + 6t > 0.
Form 4 Mathematics
a) Complete the table given below in the blank spaces.
Give your answer to the nearest degree.
Form 4 Mathematics
aNSWER
Form 4 Mathematics
The diagram below represents a field PQR
Form 4 MathematicsForm 4 Mathematics
A translation maps a point P (3,2) onto P’ (95,5)
Form 4 Mathematics
(a) Complete the following table for the equation y = x3 + 2x3
Answer
Form 4 MathematicsForm 4 Mathematics |
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