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

Find the value of x in log₁₀ (2x - 1) + log₁₀ 3 – log₁₀ (8x - 1)

Answers

log₁₀ 3(2x – 1) = log₁₀ (8x – 1)
3(2x – 1) = 8x – 1
6x – 3 = 8x – 1
2x = -2
x = -1

Kavungya answered the question on October 16, 2019 at 06:16

Answer Attachments

Next: Two fruit juices A and B are mixed together. Juice A costs sh. 50 per litre and Juice B cost sh. 80 per litre. Find...

Previous: The scheme below shows some reactions starting with magnesium oxide. Study it and answer the questions that follow:-

View more Mathematics Questions and Answers | Return to Questions Index

Exams With Marking Schemes

Related Questions

Two fruit juices A and B are mixed together. Juice A costs sh. 50 per litre and Juice B cost sh. 80 per litre. Find... (Solved)

Two fruit juices A and B are mixed together. Juice A costs sh. 50 per litre and Juice B cost sh. 80 per litre. Find the ratio of A and B in the mixture if the mixture costs sh. 59 per litre.

Date posted: October 16, 2019 . Answers (1)
Write the expression below in surd form and rationalize the denominator. (Solved)

Write the expression below in surd form and rationalize the denominator.

Date posted: October 16, 2019 . Answers (1)
The displacement, S metres of a moving particle from point O, after t seconds is given by: S = t³ – 5t² + 3t + 10 a)Find... (Solved)

The displacement, S metres of a moving particle from point O, after t seconds is given by:
S = t³ – 5t² + 3t + 10
a)Find S when t = 2
b)Determine:
i)The velocity of the particle when t = 5sec
ii)The value of t when the particles is momentarily at rest
c)Find the time, when the velocity of the particle is maximum.

Date posted: October 16, 2019 . Answers (1)
A trader bought 2 cows and 9 goats for a total of ksh. 98,200. If she had bought 3 cows and 4 goats, she would... (Solved)

A trader bought 2 cows and 9 goats for a total of ksh. 98,200. If she had bought 3 cows and 4 goats,
she would have spent ksh. 2200 less
a)Form two equations to represent the above information.
b)Use matrix method to determine the cost of a cow and that of a goat.
c)The trader later sold the animals she had bought making a profit of 30% per cow and 40% per goat.
i)Calculate the total amount of money she received.
ii)Determine, correct to 4 significant figures the percentage profit the trader made from the sale of the animals.

Date posted: October 16, 2019 . Answers (1)
A motorist left Embu for Nairobi, a distance of 240km, at 8.00a.m and travelled at an average speed of 90km/h. Another motorist left Nairobi for... (Solved)

A motorist left Embu for Nairobi, a distance of 240km, at 8.00a.m and travelled at an average speed of 90km/h. Another motorist left Nairobi for Embu at 8.30a.m and travelled at 100km/h. Find:
a)The time they met.
b)How far they met from Nairobi.

Date posted: October 16, 2019 . Answers (1)
The figure below represents a cone of height 12cm and base radius of 9cm from which a similar smaller cone is removed, leaving a conical... (Solved)

The figure below represents a cone of height 12cm and base radius of 9cm from which a similar smaller cone is removed, leaving a conical hole of height 4cm.

a)Calculate:
i) The base radius of conical hole.
ii)The volume, in terms of π of the smaller cone that was removed.
b)i) Determine, slant height of the original cone
ii)Calculate, in terms of π the surface area of the remaining solid after the smaller cone is removed.

Date posted: October 16, 2019 . Answers (1)
Without using a calculator, evaluate, giving your answer as a fraction in its simplest form (Solved)

Without using a calculator, evaluate, giving your answer as a fraction in its simplest form

Date posted: October 16, 2019 . Answers (1)
In the figure below, the tangent ST meets chord VU produced at T. Chord SW passes through the centre O, of the circle and intersects... (Solved)

In the figure below, the tangent ST meets chord VU produced at T. Chord SW passes through the centre O, of the circle and intersects chord VU at X. Line ST = 12cm and UT = 8cm.

a)Calculate the length of chord VU.
b)If WX = 3cm and VX : XU = 2 : 3, find SX.

Date posted: October 16, 2019 . Answers (1)
Triangle A¹B¹C¹ is the image of triangle ABC under the transformation represented by the matrix If the area of triangle A¹B¹C¹ is 140cm², find... (Solved)

Triangle A¹B¹C¹ is the image of triangle ABC under the transformation represented by the matrix If the area of triangle A¹B¹C¹ is 140cm², find the area of triangle ABC.

Date posted: October 16, 2019 . Answers (1)
Simplify the expression: (Solved)

Simplify the expression:

Date posted: October 16, 2019 . Answers (1)
Use logarithms, correct to 4 decimal places to evaluate. (Solved)

Use logarithms, correct to 4 decimal places to evaluate.

Date posted: October 16, 2019 . Answers (1)
A spherical ball is 15cm in diameter. What is its surface area? (Solved)

A spherical ball is 15cm in diameter. What is its surface area?

Date posted: October 16, 2019 . Answers (1)
Evaluate without using tables or a calculator; (Solved)

Evaluate without using tables or a calculator;

Date posted: October 16, 2019 . Answers (1)
a)Complete the table below to 2 d.p. b)Draw the graphs of y = cos x and y = sin x – cos x, for 0 =... (Solved)

a)Complete the table below to 2 d.p.

b)Draw the graphs of y = cos x and y = sin x – cos x, for 0 ≤ x ≤ 180
c) Using your graphs:
i) Solve the equation ½ Sin x = Cos x.
ii) State the range of values of x in 0 ≤ x ≤ 180, for which 2 Cos x ≤ Sin x.
iii) Solve the equation
Sin x – 1.25 = Cos x

Date posted: October 12, 2019 . Answers (1)
The velocity, v m/s of a particle after t seconds is given by v = t² – 2t + 4. a)i) Using the mid- coordinate rule... (Solved)

The velocity, v m/s of a particle after t seconds is given by v = t² – 2t + 4.
a)i) Using the mid- coordinate rule with six strips, estimate the distance covered by the particle between t = 1 and t =13 seconds.
ii) Find the exact distance the particle covered between t =1 and t = 13 seconds.
b)Calculate the percentage error arising from the estimate in (a) above.

Date posted: October 12, 2019 . Answers (1)
A and B are two points on the latitude 50⁰N. The two points lie on the longitudes 30⁰E and 150⁰W respectively a)Calculate: i) The distance... (Solved)

A and B are two points on the latitude 50⁰N. The two points lie on the longitudes 30⁰E and 150⁰W respectively
a)Calculate:
i) The distance in km, from A to B along the parallel of latitude. (take π= 22/7, R = 6370km)
ii) The shortest distance from A to B along the great circle, in nautical miles.
b)An aircraft takes 54 hours to fly between the two points, along the great circle. Calculate its speed in km/h.( take 1nm = 1.853km)

Date posted: October 12, 2019 . Answers (1)
a)Complete the table below for the function y = x³ + 2x² – 3x – 4, to 1 d.p b)Draw the graph of y = x³... (Solved)

a)Complete the table below for the function y = x³ + 2x² – 3x – 4, to 1 d.p

b)Draw the graph of y = x³ + 2x² – 3x – 4, using the values in the completed table.
c) Using your graph:
i) Solve the equation
x³ + 2x² – 3x = 4.
ii) Estimate the coordinates of the turning points of the curve.

Date posted: October 12, 2019 . Answers (1)
A trapezium ABCD is such that the two parallel sides are of length 18cm and 26cm. AB = 9cm and angle ABC = 45⁰. Calculate... (Solved)

A trapezium ABCD is such that the two parallel sides are of length 18cm and 26cm. AB = 9cm and angle ABC = 45⁰. Calculate the area of the trapezium to 1 decimal place.

Date posted: October 12, 2019 . Answers (1)
The end points of a diameter of a circle are P (-3, -9) and Q (7, 15). Determine the equation of the circle in the... (Solved)

The end points of a diameter of a circle are P (-3, -9) and Q (7, 15). Determine the equation of the circle in the form x²+y²+ax+by=c where a, b and c are constants.

Date posted: October 12, 2019 . Answers (1)
Find the equation of the normal to the curve y = 2x³ – 3x² + 6, when x = 2. (Solved)

Find the equation of the normal to the curve y = 2x³ – 3x² + 6, when x = 2.

Date posted: October 12, 2019 . Answers (1)