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.

Browse exam papers

Or go directly to:

Class notes Holiday assignments Topical questions Other resources

Make A the subject of the formula

Answers

Kavungya answered the question on November 18, 2019 at 13:16

Answer Attachments

Next: Simplify

Previous: The length of a rectangle is (x+1) cm. its width is 3cm shorter than its length. Given that the area of the rectangle is 22cm,...

View more Mathematics Questions and Answers | Return to Questions Index

Exams With Marking Schemes

Related Questions

Simplify (Solved)

Simplify

Date posted: November 18, 2019 . Answers (1)
Given that 8 = y = 12 and 1 = x = 6 find the maximum possible value of (Solved)

Given that 8 ≤ y ≤ 12 and 1 ≤ x ≤ 6 find the maximum possible value of

Date posted: November 18, 2019 . Answers (1)
Members of a group decides to raise k£ 100 towards a charity. Five of them were unable to contribute. Each of the rest had therefore... (Solved)

Members of a group decides to raise k£ 100 towards a charity. Five of them were unable to contribute. Each of the rest had therefore to pay k£ 1 more, in order to raise the same amount.
a) If the original number of member was x, writes downs:
i) An expression of how much each was originally to contribute.
ii) Two distinct expressions of how much each contributed after the five pulled out.
b) Calculate the value of x.
c) Solve the equation

Date posted: November 18, 2019 . Answers (1)
Two towns, Meru and Maua are 80km a part, Kimathi started cycling from Meru to Maua at 10:00 a.m at an average speed of 40km/h.... (Solved)

Two towns, Meru and Maua are 80km a part, Kimathi started cycling from Meru to Maua at 10:00 a.m at an average speed of 40km/h. Mutuma started his journey from Maua to Meru at 10:30 a.m and travelled by car at an average speed of 60km/h.
(a) Calculate:
i) The time taken by Kimathi and Mutuma to meet.
ii) The distance from Meru when Kimathi and Mutuma met.
iii) The time of the day when the two met.
(b) Murianki cycled from his home to a school 6km away in 20 minutes. He stopped at the school for 5 minutes, before taking a motorbike to a town 40 km away. The motorbike travelled at 75km/h. On the grid provided, draw a distance time graph to represent Murianki’s journey.

Date posted: November 18, 2019 . Answers (1)
The table below shows the age groups and number of people who are HIV/ AIDS positive, in a certain sub county in Kenya. a) State the... (Solved)

The table below shows the age groups and number of people who are HIV/ AIDS positive, in a certain sub county in Kenya.

a) State the modal age group.
b) Calculate the mean age of the people who are HIV/AIDS Positive.
c) Calculate the median of the age group.
d) Draw on the grid provided a histogram to represent the above information.

Date posted: November 18, 2019 . Answers (1)
The diagram below shows a solid made of a hemisphere and a cylinder. The radius of both the cylinder and the hemisphere is 3cm. The... (Solved)

The diagram below shows a solid made of a hemisphere and a cylinder. The radius of both the cylinder and the hemisphere is 3cm. The length of the cylinder is 12cm.

a) i) Calculate the volume of the solid.
ii) The solid fits in a box in the shape of a cuboid 15 cm by 6cm by 6cm. Calculate the volume of the box not occupied by the solid correct to four significant figures.
b) i) Calculate the total surface area of the solid correct to four significant figures.
ii) The surface of the solid is to be painted. One millilitre of paint covers an area of 8cm². The cost of paint is Ksh 900 per litre. Calculate the cost of the paint required.

Date posted: November 18, 2019 . Answers (1)
The figure below shows triangle T with vertices P(2,4), Q(6,2) and R(4,8). It is mapped onto triangle T/ with vertices P/(10,0), Q/(8,-4) and R/(14, -2)... (Solved)

The figure below shows triangle T with vertices P(2,4), Q(6,2) and R(4,8). It is mapped onto triangle T/ with vertices P/(10,0), Q/(8,-4) and R/(14, -2) by a rotation.
Draw on the same axis T/ the image of triangle T.

Date posted: November 18, 2019 . Answers (1)
The figure below is not drawn to scale. Find correct to 1 decimal place; (a) Length PQ. (b) Angle ABC (Solved)

The figure below is not drawn to scale.

Find correct to 1 decimal place;
(a) Length PQ.
(b) Angle ABC

Date posted: November 18, 2019 . Answers (1)
Line K whose equation is 2y - 6 = 4x is perpendicular to another line Q. Find the equation of line Q if it passes... (Solved)

Line K whose equation is 2y - 6 = 4x is perpendicular to another line Q. Find the equation of line Q if it passes through point. (-2,7).

Date posted: November 18, 2019 . Answers (1)
Using trapezoid rule, estimate the area under the curve y = 1/2x² - 2 bounded by lines, x =2 and x=8 and x –axis use... (Solved)

Using trapezoid rule, estimate the area under the curve y = 1/2x² - 2 bounded by lines, x =2 and x=8 and x –axis use six strips.

Date posted: November 18, 2019 . Answers (1)
The sum of interior angles of a polygon is 1980⁰. Find the number of sides of the polygon and name the polygon. (Solved)

The sum of interior angles of a polygon is 1980⁰. Find the number of sides of the polygon and name the polygon.

Date posted: November 18, 2019 . Answers (1)
Find the value of t in the equation (Solved)

Find the value of t in the equation

Date posted: November 18, 2019 . Answers (1)
In a mixed school there are 900 students, out of these 600 are girls. (a) Find the ratio of boys to girls. (b) What is the... (Solved)

In a mixed school there are 900 students, out of these 600 are girls.
(a) Find the ratio of boys to girls.
(b) What is the percentage of boys in this school?

Date posted: November 18, 2019 . Answers (1)
During an annual general meeting at Elimu Mixed Day, goats and chicken were slaughtered. The number of heads for both chicken and goats were 45.... (Solved)

During an annual general meeting at Elimu Mixed Day, goats and chicken were slaughtered. The number of heads for both chicken and goats were 45. The total number of legs were 100. Determine the exact number of goats and chicken slaughtered.

Date posted: November 18, 2019 . Answers (1)
The diagram below represents a prism whose Cross-section is a right angled triangle. Draw the net of the solid. (Solved)

The diagram below represents a prism whose Cross-section is a right angled triangle. Draw the net of the solid.

Date posted: November 18, 2019 . Answers (1)
Simplify the equation (Solved)

Simplify the equation

Date posted: November 18, 2019 . Answers (1)
Evaluate the value of x in 81^x+1 + 3^4x = 246 (Solved)

Evaluate the value of x in 81^𝑥+1 + 3^4𝑥 = 246

Date posted: November 18, 2019 . Answers (1)
A 890kg culvert is made of a hollow cylindrical material with outer radius of 76cm and an inner radius of 62cm. It crosses a road... (Solved)

A 890kg culvert is made of a hollow cylindrical material with outer radius of 76cm and an inner radius of 62cm. It crosses a road of width 3m. Determine the density of the material used in its construction in Kg/m³ correct to one decimal place.

Date posted: November 18, 2019 . Answers (1)
Using logarithm table evaluate (Solved)

Using logarithm table evaluate

Date posted: November 18, 2019 . Answers (1)
When a certain number is divided by 48, 72 or 100 the remainder is 3 in each case. Find the number. (Solved)

When a certain number is divided by 48, 72 or 100 the remainder is 3 in each case. Find the number.

Date posted: November 18, 2019 . Answers (1)