Study resources on Kenyaplex

Get ready-made curriculum aligned revision materials

Exam papers, notes, holiday assignments and topical questions – all aligned to the Kenyan curriculum.

Or go directly to:

Class notes Holiday assignments Topical questions Other resources

Three years ago, Joseph was three times older than Agnes. In two years time the sum of their ages will be 75. Determine their present...

Three years ago, Joseph was three times older than Agnes. In two years time the sum of their ages will be 75. Determine their present ages.

Answers

Wilfykil answered the question on August 13, 2019 at 05:42

Answer Attachments

Next: simplify the expression below.

Previous: By use of reciprocals, evaluate the following and give answer to 3 decimal places

View more Mathematics Questions and Answers | Return to Questions Index

Exams With Marking Schemes

Related Questions

simplify the expression below. (Solved)

simplify the expression below.

Date posted: August 13, 2019 . Answers (1)
Find the L.C.M of (x—1), x² – 1 and x² + 2x + 1 (Solved)

Find the L.C.M of (x—1), x² – 1 and x² + 2x + 1

Date posted: August 13, 2019 . Answers (1)
A cone is made by cutting off a sector as shown below from a circle and gluing the straight edges of the sector. The cone formed... (Solved)

A cone is made by cutting off a sector as shown below from a circle and gluing the straight edges
of the sector. The cone formed has slant height 14cm and circular base of perimeter 11cm

(a) Calculate the value of theta
(b) The radius of the cone’s circular base
(c) The height of the cone.
(d) The cone is cut uniformly on a horizontal plane 1cm below the apex. Calculate the slant
height of the frustum so formed correct to 2 decimal places.

Date posted: August 13, 2019 . Answers (1)
The sum of all but one of the internal angles of pentagon is 400⁰. Find the number of degrees in the remaining angle. (Solved)

The sum of all but one of the internal angles of pentagon is 400⁰. Find the number of degrees in the remaining angle.

Date posted: August 13, 2019 . Answers (1)
On some day, Mr. Makori bought some oranges worth ksh. 45. On another day of the same week, Mrs Makori spent the same amount of... (Solved)

On some day, Mr. Makori bought some oranges worth ksh. 45. On another day of the same week, Mrs Makori spent the same amount of money but bought the oranges at a discount of 75 cents per orange.

(a) If Mr. Makori bought an orange at sh x, write down a simplified expression for the total number of oranges bought by the two in the week.
(b) If Mrs. Makori bought 2 oranges more than her husband, find how much each spent on an orange.
(c) Find the number of oranges bought for the family that week.

Date posted: August 13, 2019 . Answers (1)
Two circles with centres O₁ and O₂, have radii 7cm and 6cm respectively. (Solved)

Two circles with centres O₁ and O₂, have radii 7cm and 6cm respectively. The two circles intersect at P and Q and the length of the common chord PQ is 10cm.

Calculate the area of the shaded region in the above diagram to 4 significant figures.

Date posted: August 13, 2019 . Answers (1)
A certain number of people were to contribute equally to buy books worth sh.1200 for a school library. Five people pulled out, so the others... (Solved)

A certain number of people were to contribute equally to buy books worth sh.1200 for a school library. Five people pulled out, so the others agreed to contribute on extra sh.10 each. Their contributions enabled them to buy books worth sh.200 more than originally expected.
(a) If the original number of people was x, write an expression of how much each was originally
to contribute.
(b)Write down two expression of how much each contributed after the five people pulled out.
(c) Calculate how many people made the contribution.

Date posted: August 9, 2019 . Answers (1)
A wooden drum closed at the top and bottom has a top radius of 28cm and bottom radius 21cm, its height is 90cm. The drum... (Solved)

A wooden drum closed at the top and bottom has a top radius of 28cm and bottom radius 21cm, its height is 90cm. The drum is covered with leather excluding the top and bottom.

Calculate;
(a) The volume of the drum in litres
(b) The area of the leather covering the drum excluding the top and bottom.

Date posted: August 9, 2019 . Answers (1)
Find the number of sides of a regular polygon whose sum of interior angle is 2520⁰ (Solved)

Find the number of sides of a regular polygon whose sum of interior angle is 2520⁰

Date posted: August 9, 2019 . Answers (1)
The figure below represents a model of a house whose base ABCD is a square of sides 10cm. AE= 15cm and EV=13cm. a).(i) Draw the net... (Solved)

The figure below represents a model of a house whose base ABCD is a square of sides 10cm. AE= 15cm and EV=13cm.

a).(i) Draw the net of the model
(ii) Calculate the total surface area of the solids
(b) The cross section of a prism consists of a regular hexagon of side 4.8cm as shown in the figure below
(i) Find the area of the cross-section
(ii) If the prism is 15cm long, calculate its volume

Date posted: August 9, 2019 . Answers (1)
In the figure below QOT is a diameter and angle QTP = 48⁰, angle TQR = 76⁰ and angle SRT = 37⁰. Calculate giving reasons in each... (Solved)

In the figure below QOT is a diameter and angle QTP = 48⁰, angle TQR = 76⁰ and angle
SRT = 37⁰.

Calculate giving reasons in each case
(a) Angle RST
(b) Angle SUT
(c) Obtuse angle ROT
(d) Angle PST
(e) Reflex angle SOP

Date posted: August 9, 2019 . Answers (1)
The table below shows the masses of form four students of Tenwek high school. (a)State the model class (c) Using an assumed mean of 57, calculate... (Solved)

The table below shows the masses of form four students of Tenwek high school.

(a)State the model class
(c) Using an assumed mean of 57, calculate the
(i) Mean mass
(ii) The standard deviation
(d) Find the mass of the 50^th Student

Date posted: August 9, 2019 . Answers (1)
A straight road is northwards along the top of a vertical cliff of height 40m. A man at the top of the cliff spots a stationary... (Solved)

A straight road is northwards along the top of a vertical cliff of height 40m. A man at the top of the cliff spots a stationary boat on a bearing of 90⁰ from the foot of the cliff and at an angle of depression of 30⁰. He walks northwards and after one minute views the stationary boat on a bearing of 110⁰ from the foot of the cliff as he moves at a constant speed.
(a) Make a sketch to represent the position of the man and the boat.
(b) Calculate the distance of the boat from the foot of the cliff.
(c) Find the shortest distance from the position of the man to the stationary boat after 1 minute
(d) Calculate the speed of the man in meters per second.

Date posted: August 9, 2019 . Answers (1)
The ends of the roof of a workshop are segment of a circle of radius 10m. The roof is 20m long . The angle of... (Solved)

The ends of the roof of a workshop are segment of a circle of radius 10m. The roof is 20m long . The angle of the centre is 120⁰ as shown in the figure below

(a) Calculate:
(i) The area of one end of the roof.
(ii) The area of the curve surface of the roof.
(b) What would be cost to the nearest shilling of covering the two ends and the curved surface with galvanized iron sheet costing sh.80 per square meter.

Date posted: August 9, 2019 . Answers (1)
Draw the net of the solid below given that is a right pyramid and that AB = 4cm = BC = CD = AD and... (Solved)

Draw the net of the solid below given that is a right pyramid and that AB = 4cm = BC = CD = AD and BE= 6cm

Date posted: August 9, 2019 . Answers (1)
Solve for x in the equation 2 log x + log 5 = 1 + 3 log 2. (Solved)

Solve for x in the equation
2 log x + log 5 = 1 + 3 log 2.

Date posted: August 9, 2019 . Answers (1)
A sales woman earns a monthly wage of ksh. 3000 and gets a commission for the goods she sells. In a certain month she sells... (Solved)

A sales woman earns a monthly wage of ksh. 3000 and gets a commission for the goods she sells. In a certain month she sells goods worth ksh. 16,000 and her earning was ksh. 16,000 and her total earning was ksh.4,280.Determine the rate of the commission.

Date posted: August 9, 2019 . Answers (1)
Three towns A, B, and C are situated such that B is 50 km on a bearing of 150⁰ from town B (a) Draw a sketch... (Solved)

Three towns A, B, and C are situated such that B is 50 km on a bearing of 150⁰ from town B
(a) Draw a sketch showing the positions of towns A, B and C.
(b) Calculate;
(i) The size of Angle ABC
(ii)The distance of C and A

Date posted: August 9, 2019 . Answers (1)
The angle of elevation of the top of a tree from a point P is 22.6⁰. From another point Q which is 12m from the... (Solved)

The angle of elevation of the top of a tree from a point P is 22.6⁰. From another point Q which is 12m from the base of the tree, the angle of elevation of the top of the tree is 47.5⁰
(a) The height of the tree
(b) The distance between P and Q

Date posted: August 9, 2019 . Answers (1)
The length of a rectangle is increased by 25% while its width is decreased by 5%. Determine the percentage increase in the area of the... (Solved)

The length of a rectangle is increased by 25% while its width is decreased by 5%. Determine the percentage increase in the area of the rectangle.

Date posted: August 9, 2019 . Answers (1)