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Make C the subject of the formula.
Date posted:
October 12, 2019
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A rectangle whose area is 15cm2 is transformed by a matrix 
.Determine the area of its image under the matrix of transformation.
Date posted:
October 12, 2019
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If 
find the value of a + b + c.
Date posted:
October 12, 2019
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The figure below shows a triangular prism ABCDEF
a)Draw the net of the prism
b)A fly walks from A to D along the diagonals of rectangular faces:
i)On your net show the locus of the fly.
ii)Measure the distance covered by the fly, one way.
iii)The fly takes 15 seconds to reach D one way. Calculate its’ speed in, km/h.
Date posted:
October 12, 2019
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The figure below shows a circle centre O and a cyclic quadrilateral ABCD. Angle ACB =400 and angle DAC =200 AOC is a straight line.
Giving reasons find the size of:
i)ABD
ii)BAC
iii)ACD
iv)CBD
v)Reflex ADC
Date posted:
October 12, 2019
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Four points P, Q, R and S lie on the same plane. Point P is 42km due south west of R. Q is 15km on a bearing of S60E from R. Point D is equidistant from P and Q.
a)Using a scale of 1cm represents 10km, construct a diagram showing the positions of P, Q, R and S
b)Using your diagram determine:
i)Distance between P and Q
ii)Bearing of S from P
iii)Distance from S to R
Date posted:
October 12, 2019
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A bus left Mombasa at 7.45 am towards Nairobi at an average speed of 60km/h. A saloon car left Mombasa at 9.15 am on the same day along the same road at an average of 120km/h. the distance between Mombasa and Nairobi is 360km.
a)Determine the time of day when the salon car overtook the bus.
b)Both vehicles contained towards Nairobi at their original speed. How long had the saloon car waited in Nairobi before the bus arrived.
Date posted:
October 12, 2019
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A tourist in Nakuru had 870 Euros, 629 pounds and some dollars. If on changing his money he had Ksh 0.18 million, how much dollars did he have before changing his money, if he was charged a tax of 10%, when the exchange rates were:-
1 pound = Ksh 70, 1 dollar = Ksh 120 and 1 Euro = Ksh 106.
Give your answer to the nearest whole number.
Date posted:
October 12, 2019
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Giving reasons, find the value of y in the figure below.
Date posted:
October 12, 2019
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If 2x + y = 16 and 42x-y = ¼, find y – x: 2y
Date posted:
October 11, 2019
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Water and alcohol are mixed in the ratio 1:4. If the density of water and alcohol are 1g/cm3 and 0.8g/cm3 respectively. Find the density of the mixture.
Date posted:
October 11, 2019
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The projection of a line onto a plane is two thirds the length of the line. Find the angle between the line and the plane.
Date posted:
October 11, 2019
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Line AB is such that A(5, -2) and B(7, -4). The line is mapped onto A1(5, -12) and B1(3, -10), by an enlargement. Determine the centre and scale factor of the enlargement. (Use the grid given)
Date posted:
October 11, 2019
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When a retailer sold an article at Ksh 550 after a discount of 15%, he made a profit of 10%. What would have been his profit if he did not allow the discount?
Date posted:
October 11, 2019
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Simplify completely the expression.
Date posted:
October 11, 2019
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Use logarithms tables only to evaluate.
Date posted:
October 11, 2019
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The mean of the number k, 8k + 1, 17 and 20 is 14. Find the mode of the numbers.
Date posted:
October 11, 2019
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Without using a calculator evaluate
Date posted:
October 11, 2019
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Below are the pH values of 4 types of medicine represented by letters P, Q, R and S
a) It is not advisable to use S when a patient has indigestion .Explain
b) What is the role of chemistry in drug manufacture
Date posted:
October 11, 2019
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During the electrolysis of dilute copper {II} chloride using carbon electrodes, a current of 1.5A was passed through the solution for 2 hours and 30 minutes.
[a] Write the ionic equation of the reaction that occurred at the cathode.
b] Given R.A.M of copper = 64 and 1F = 96500C, calculate the change in mass of the cathode.
Date posted:
October 11, 2019
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A reaction can be represented as;
Date posted:
October 11, 2019
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A polymer can be represented as follows
[a] Name and draw the structure of the monomer.
[b] What type of polymerization occurs in the above case?
[c] Given that the molecular mass of the polymer is 25620, how many units of the monomer make the polymer.
Date posted:
October 11, 2019
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At 600C, 38 grams of lead{II} nitrate saturate 56cm3 of water. Determine the solubility of lead {II} nitrate at this temperature.
Date posted:
October 11, 2019
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Rusting is a process that causes massive destruction of iron structures.
[a] State one condition that accelerates rusting.
[b] State one advantage of rusting.
Date posted:
October 11, 2019
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Solid copper (II) oxide is a base although it does not turn litmus paper to blue. Explain
Date posted:
October 11, 2019
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When sodium nitrate was heated a solid A and gas B were produced identify solid A and gas B.
Date posted:
October 11, 2019
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Give one example of an acid salt .
Date posted:
October 11, 2019
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The reduction potential of elements K, L, M, and P are as given below.
(i) Which letter represents the, strongest reducing agent? give a reason.
(ii) Which two letters represent elements whose half cells would form an electro chemical cell with the largest e.m.f?.
(iii) Calculate the e.m.f of the cell formed in (ii) above.
(d) During the electrolysis of a molten chloride of metal Q, a current of 0.25A was passed though the molten chloride for 2 hours and 10minutes. Given that 0.9grams of metal Q were deposited at the cathode.
(i) Calculate the quantity of electricity passed.
(ii) Charge carried by the ions of metal Q given that R.A.M of metal Q is 84.
Date posted:
October 11, 2019
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(a) Calamine is one of the ores from which zinc can be extracted from.
(i) Name any other ore from which zinc can be extracted from.
(ii) The calamine is usually decomposed by heating to obtain substance M as shown below.
Identify substance M.
(iii) Identify two methods that can be used to obtain zinc from substance M
(b) During the extraction of zinc, name two gases likely to emitted into the air and that are likely to cause pollution
(c) State one likely pollution effects of each of the gases you have mentioned in (a) above
(d) State one possible use of zinc metal
Date posted:
October 11, 2019
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The information below gives PH values of solutions V, W, X, Y Z
(a) Which solution is likely to be:
(i) Calcium hydroxide?
(ii) Rain water?
(b) Which solution would react most vigorously with Zinc carbonate
Date posted:
October 11, 2019