- a) Find A-1, the inverse of matrix A =
b) Ibanda sells white and brown loaves of bread in his kiosk. On a certain day he...(Solved)
a) Find A-1, the inverse of matrix A = 
b) Ibanda sells white and brown loaves of bread in his kiosk. On a certain day he sold 6 white loaves of bread and 5 brown ones for a total of Kshs. 520. The next day he sold 4 white loaves and 7 brown ones for a total of Kshs. 530.
i. Form a matrix equation to represent the above information.
ii. Use matrix method to find the price of a white loaf of bread and that of a brown loaf of bread.
c) A school canteen bought 240 white loaves of bread and 100 brown loaves of bread. A discount of 10% was allowed on each white loaf whereas a discount of 13% was allowed on each brown loaf of bread. Calculate the percentage discount on the cost of all the loaves of bread bought.
Date posted: November 13, 2019. Answers (1)
- A sector of angle 1080 is cut from a circle of radius 20 cm. It is folded to form a cone.
Calculate:
(a) The curved surface area...(Solved)
A sector of angle 1080 is cut from a circle of radius 20 cm. It is folded to form a cone.
Calculate:
(a) The curved surface area of the cone.
(b) The base radius of the cone.
(c) The vertical height of the cone.
(d) If 12 cm of the cone is chopped off to form a frustrum as shown below.
Calculate the volume of the frustum formed.
Date posted: November 13, 2019. Answers (1)
- Nyongesa is a sales executive earning a salary of Kshs. 120,000 and a commission of 8% for the sales in excess of Kshs. 1,000,000. If...(Solved)
Nyongesa is a sales executive earning a salary of Kshs. 120,000 and a commission of 8% for the sales in excess of Kshs. 1,000,000. If in January he earned a total of Kshs. 480,000 in salaries and commission.
(a) Determine the amount of sales he made in the month of January.
(b) If the total sales in the month of February increased by 18% and in the month of March dropped by 30% respectively;
Calculate:-
(i) Nyongesa’s commission in the month of February.
(ii) His total earning in the month of March.
Date posted: November 13, 2019. Answers (1)
- The figure below shows two sectors in which AB and CD are arcs of concentric circles centre O.
Angle AOB = 2/5 radians and AD =...(Solved)
The figure below shows two sectors in which AB and CD are arcs of concentric circles centre O.
Angle AOB = 2/5 radians and AD = BC = 5 cm.
Given that the perimeter of the shape ABCD is 24 cm, calculate the length of OA.
Date posted: November 13, 2019. Answers (1)
- A solid consists of a cone and a hemisphere. The common diameter of the cone and the hemisphere is 12 cm and the slanting height...(Solved)
A solid consists of a cone and a hemisphere. The common diameter of the cone and the hemisphere is 12 cm and the slanting height of the cone is 10 cm. Calculate correct to two decimal places, the surface area of the solid.
Date posted: November 13, 2019. Answers (1)
- Solve for y given that y is acute and sin (3y – 500) – cos (2y + 100) = 0(Solved)
Solve for y given that y is acute and sin (3y – 500) – cos (2y + 100) = 0
Date posted: November 13, 2019. Answers (1)
- Factorise Completely:-
x4 – 2x2y2 + y4(Solved)
Factorise Completely:-
x4 – 2x2y2 + y4
Date posted: November 13, 2019. Answers (1)
- Janice, a fruit vendor obtained a total of Kshs. 6144 from her sales of oranges on Saturday at Kshs. 8.00 each. She had bought 560...(Solved)
Janice, a fruit vendor obtained a total of Kshs. 6144 from her sales of oranges on Saturday at Kshs. 8.00 each. She had bought 560 more oranges to add to what had remained on Friday where she had sold 240 more oranges than on Thursday. She had sold 750 oranges on Thursday. Calculate the total number of oranges Janice had bought on Thursday.
Date posted: November 13, 2019. Answers (1)
- Using a ruler and a pair of compasses only, construct a rhombus PQRS such that PQ = 6 cm and angle PQR = 1350 hence...(Solved)
Using a ruler and a pair of compasses only, construct a rhombus PQRS such that PQ = 6 cm and angle PQR = 1350 hence measure the shortest diagonal.
Date posted: November 13, 2019. Answers (1)
- Complete the diagram below so as to make a net for a cuboid. Hence find the surface area of the cuboid.(Solved)
Complete the diagram below so as to make a net for a cuboid. Hence find the surface area of the cuboid.
Date posted: November 13, 2019. Answers (1)
- Simplify:-(Solved)
Simplify:-
Date posted: November 13, 2019. Answers (1)
- In the diagram below, the position vector of points A and B with respect to point O are respectively.
Given that B is a point...(Solved)
In the diagram below, the position vector of points A and B with respect to point O are 
respectively.
Given that B is a point on AC such that AB = ½ BC. Use vector method to determine the coordinates of C.
Date posted: November 13, 2019. Answers (1)
- Wanyama on arrival in Kenya to play for Harambee Stars against Uganda Cranes converted 6000 Euros into Kenyan Shillings. During his stay in Kenya he...(Solved)
Wanyama on arrival in Kenya to play for Harambee Stars against Uganda Cranes converted 6000 Euros into Kenyan Shillings. During his stay in Kenya he spent Kshs. 260,000 and converted the remaining amount into US Dollars before travelling back to England. Using the exchange rates below, find how many US Dollars he got?
Currency Buying Selling
(Kshs.) (Kshs.)
1 US Dollar 96.20 96.90
1 Euro 112.32 112.83
Date posted: November 13, 2019. Answers (1)
- The sum of four consecutive odd integers is greater than 24. Determine the first four such integers.(Solved)
The sum of four consecutive odd integers is greater than 24. Determine the first four such integers.
Date posted: November 13, 2019. Answers (1)
- Wafula uses 1/6 of his land for planting maize, 1/12 for beans and 4/9 of the remainder for grazing.
He still has 10 hectares of unused...(Solved)
Wafula uses 1/6 of his land for planting maize, 1/12 for beans and 4/9 of the remainder for grazing.
He still has 10 hectares of unused land. Find the size of Wafula’s land.
Date posted: November 13, 2019. Answers (1)
- Without using a calculator evaluate:-(Solved)
Without using a calculator evaluate:-
Date posted: November 13, 2019. Answers (1)
- A Japanese tourist visiting Kenya changed 1,305,000 Yen into Kenya shillings. While in Kenya he spent Ksh. 460,000 and converted the rest to sterling pounds...(Solved)
A Japanese tourist visiting Kenya changed 1,305,000 Yen into Kenya shillings. While in Kenya he spent Ksh. 460,000 and converted the rest to sterling pounds as he headed back to the U.K. Calculate the amount he got to the nearest pound if the bank buys and sells currency as shown below.
Buying (Ksh) Selling (Ksh)
100 Yen 65 66
1 sterling pound 126 127
Date posted: November 13, 2019. Answers (1)
- The table below shows distribution of masses of 65 goats to the nearest kilogram sold in a certain market.
Find the median mass.(Solved)
The table below shows distribution of masses of 65 goats to the nearest kilogram sold in a certain market.
Find the median mass.
Date posted: November 13, 2019. Answers (1)
- Solve for x and hence list the integral values of x.
x = 2x + 7 < 14 - 1/3x(Solved)
Solve for x and hence list the integral values of x.
x ≤ 2x + 7 < 14 - 1/3x
Date posted: November 13, 2019. Answers (1)
- A solid is made up of a hemisphere mounted on a cone. The radius of the cone and the radius of the hemisphere are each...(Solved)
A solid is made up of a hemisphere mounted on a cone. The radius of the cone and the radius of the hemisphere are each 7cm and the vertical height of the cone is 13cm. Calculate the total surface area of the solid correct to two decimal places.
Date posted: November 13, 2019. Answers (1)