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- Rationalize the following leaving your answer in the simplified surd form.(Solved)
Rationalize the following leaving your answer in the simplified surd form.
![fig112092019903.png](/questions/uploads/fig112092019903.png)
Date posted: September 20, 2019.
- If ? is an acute angle find the value of Cos ? in the panating:
4 Sin2?-5 Cos ?+2=0(Solved)
If θ is an acute angle find the value of Cos θ in the panating:
4 Sin2θ-5 Cos θ+2=0
Date posted: September 20, 2019.
- Give that x= 4 is a root of x2+kx-20=0. Find the value of k and thus other roots(Solved)
Give that x= 4 is a root of x2+kx-20=0. Find the value of k and thus other roots
Date posted: September 20, 2019.
- Copy and complete the table below for the function y=4+5x-x2 for -2=x=7(Solved)
Copy and complete the table below for the function y=4+5x-x2 for -2≤x≤7
![fig52092019847.png](/questions/uploads/fig52092019847.png)
Date posted: September 20, 2019.
- The arrangements below shows a set-up to investigate the effect of an electric current on molten lead (II) iodide.(Solved)
The arrangements below shows a set-up to investigate the effect of an electric current on molten lead (II) iodide.
a) Identify two mistakes in the set-up.
b) State three observations made after correcting the mistakes.
c) What particles are responsible for electrical conductivity?
d) Write the equations for the reactions taking place at the electrodes.
e) Indicate on the diagram direction of flow of electric current.
Date posted: September 20, 2019.
- A supermarket is stocked with plates which come from two suppliers A and B. They are bought in the ratio of 3:5 respectively, 10% of...(Solved)
A supermarket is stocked with plates which come from two suppliers A and B. They are bought in the ratio of 3:5 respectively, 10% of plates from A are defective and 6% of the plates from B are defective.
(a) A plate is chosen by a buyer at random. Find the probability that;
(i) it is from A
(ii) it is from B and it is defective.
(iii) it is defective
(b) Two plates are chosen at random. Find the probability that:
(i) both are defective
(ii) at least one is not defective.
Date posted: September 20, 2019.
- The points X and Y are both on latitude 39oN. The longitude of X is 73oW and the longitude of Y is 18oW . Two...(Solved)
The points X and Y are both on latitude 39oN. The longitude of X is 73oW and the longitude of Y is 18oW . Two ships P and Q leave X at the same time and travel to Y along the line of latitude. The ships P and Q travel at constant speeds of 25km/hr and 20km/h respectively. Taking the radius of the earth to be 6371km and π= 22/7 ;Calculate:-
(a) The distance Q still has to travel when P reaches Y.
(b) At the same time a third ship R leaves Y traveling due west at an average speed of 15km/hr.
Calculate the longitude of the point at which R meets P.
Date posted: September 20, 2019.
- In a square PQRS, A is the mid-point of PQ and B is the mid-point of QR, while C is a point on BP such...(Solved)
In a square PQRS, A is the mid-point of PQ and B is the mid-point of QR, while C is a point on BP such that 2BC = 3CP. The co-ordinates of P, Q and S are (4,4), (14,4) and (4,14) respectively. Find:
(a) (i) the column vectors of PQ and PS.
(ii) co-ordinates of R
(b) Show that A, C, S are collinear.
Date posted: September 20, 2019.
- The nth term of a series is given by 3n+4.
(a) Write down the first four terms of the series.
(b) Find the sum of the first...(Solved)
The nth term of a series is given by 3n+4.
(a) Write down the first four terms of the series.
(b) Find the sum of the first twenty terms of the series.
(c) Find the 30th term.
(d) Show that the sum of the first n terms of the sequence is given by Sn=3/2n2+11/2n. Hence or otherwise, find the largest integral value of n such that Sn ≥130.
Date posted: September 20, 2019.
- Study the information in the table below and answer the questions that follow, letters do not represent actual symbols of the element.(Solved)
Study the information in the table below and answer the questions that follow, letters do not represent actual symbols of the element.
a) Write the electronic configuration of an ion of elements T and U.
b) Why do the elements represented by R and S have two values of melting point.
c) Select an element:
i) Which is the most electronegative.
ii) That belongs to period 4, explain.
d) Explain why:
i) Ionic radius of R is bigger than its atomic radius.
ii) The atomic radius of L is bigger than that of R yet they are in the same period.
e) Using dots (.) and cross (x) to represent outermost electron show bonding in the compound formed between L and M.
f) Write an equation for the reaction that occurs between U and water.
g) Describe how a solid mixture of the sulphate of element N and lead (II) sulphate can be separated into solid sample of dry lead (II) sulphate.
Date posted: September 20, 2019.
- Eleza jinsi uwililugha unaweza kuleta athari katika lugha na mawasiliano miongoni mwa wanajamii.(Solved)
Eleza jinsi uwililugha unaweza kuleta athari katika lugha na mawasiliano miongoni mwa wanajamii.
Date posted: September 19, 2019.
- Eleza juhudi zozote tano zinazotumiwa kukiendeleza Kiswahili sanifu nchini Kenya.(Solved)
Eleza juhudi zozote tano zinazotumiwa kukiendeleza Kiswahili sanifu nchini Kenya.
Date posted: September 19, 2019.
- Tambua kishazi huru na kishazi tegemezi.
Tumeanzisha shirika ili tunyanyue hali yetu.(Solved)
Tambua kishazi huru na kishazi tegemezi.
Tumeanzisha shirika ili tunyanyue hali yetu.
Date posted: September 19, 2019.
- Kanusha sentensi hii
Ugonjwa huu ungalidhibitiwa mapema kifo kingaliepukwa(Solved)
Kanusha sentensi hii
Ugonjwa huu ungalidhibitiwa mapema kifo kingaliepukwa
Date posted: September 19, 2019.
- Badilisha katika kauli ya kutendua.
Tundika picha hiyo ukutani na uyabandike maandishi kitabuni.(Solved)
Badilisha katika kauli ya kutendua.
Tundika picha hiyo ukutani na uyabandike maandishi kitabuni.
Date posted: September 19, 2019.
- Tambua shamirisho kipozi, kitondo na shamirisho ala katika sentensi ifuatayo.
Baba amemnunulia mtoto fulana nzuri iliyoshonwa kwa uzi mwekundu.(Solved)
Tambua shamirisho kipozi, kitondo na shamirisho ala katika sentensi ifuatayo.
Baba amemnunulia mtoto fulana nzuri iliyoshonwa kwa uzi mwekundu.
Date posted: September 19, 2019.
- Find the equation of the tangent to the circle x2+y2-8x+2y+7=0 at the point (3, 2). Give your answer in the form y=ax+b. (Solved)
Find the equation of the tangent to the circle x2+y2-8x+2y+7=0 at the point (3, 2). Give your answer in the form y=ax+b.
Date posted: September 19, 2019.
- Andika katika msemo wa taarifa;
"Tusipofanya kazi yetu kwa bidii na kujitegemea,tutabaki kuwa watumwa katika nchi yetu" Rais alisema.(Solved)
Andika katika msemo wa taarifa;
"Tusipofanya kazi yetu kwa bidii na kujitegemea,tutabaki kuwa watumwa katika nchi yetu" Rais alisema.
Date posted: September 19, 2019.
- Kwa kutungia sentensi, tofautisha vitate hivi.
i) Ghali
ii) Gari(Solved)
Kwa kutungia sentensi, tofautisha vitate hivi.
i) Ghali
ii) Gari
Date posted: September 19, 2019.
- Without using mathematical tables and calculators simplify:(Solved)
Without using mathematical tables and calculators simplify:
![fig10219920191705.png](/questions/uploads/fig10219920191705.png)
Date posted: September 19, 2019.
- Tumia =O‘ rejeshi.
i) Msichana ambaye huja ni mwanasheria
ii) Maovu ambayo aliyatenda hayasahauliki(Solved)
Tumia ‗O‘ rejeshi.
i) Msichana ambaye huja ni mwanasheria
ii) Maovu ambayo aliyatenda hayasahauliki
Date posted: September 19, 2019.
- Tambua aina ya vitenzi kwa kutaja majina yake.
Babu angali anasoma gazeti(Solved)
Tambua aina ya vitenzi kwa kutaja majina yake.
Babu angali anasoma gazeti.
Date posted: September 19, 2019.
- In the figure below, AB is a tangent, meeting chord CDE at B. DE=xcm
Determine:
(a) the value of x
(b) the length of AB (Solved)
In the figure below, AB is a tangent, meeting chord CDE at B. DE=xcm
Determine:
(a) the value of x
(b) the length of AB
Date posted: September 19, 2019.
- Andika katika hali ya udogo
Mbwa mwenye ukali alimfukuza mtoto(Solved)
Andika katika hali ya udogo
Mbwa mwenye ukali alimfukuza mtoto
Date posted: September 19, 2019.
- PQRS is a cyclic quadrilateral in which PQ=6cm, QR=2cm, RS=6.5cm, PR=7.2cm and angle PRS=70o.
Determine values of x.(Solved)
PQRS is a cyclic quadrilateral in which PQ=6cm, QR=2cm, RS=6.5cm, PR=7.2cm and angle PRS=70o.
Determine values of x.
Date posted: September 19, 2019.
- Tambua na ueleze aina za vielezi katika sentinsi hizi.
i) Mama alimwamrisha mtoto wake kijeshi
ii) Askari hutembea makundi makundi(Solved)
Tambua na ueleze aina za vielezi katika sentinsi hizi.
i) Mama alimwamrisha mtoto wake kijeshi
ii) Askari hutembea makundi makundi
Date posted: September 19, 2019.
- Use matrix method to solve simultaneous equations.
3x + 7y = 11
x – y + 4 = 0
(Solved)
Use matrix method to solve simultaneous equations.
3x + 7y = 11
x – y + 4 = 0
Date posted: September 19, 2019.
- The distance between Sotik and Nakuru is 130km. car x starts from Sotik at 8.00 a.m and travels at 40km/hr towards Nakuru. A second car...(Solved)
The distance between Sotik and Nakuru is 130km. car x starts from Sotik at 8.00 a.m and travels at 40km/hr towards Nakuru. A second car y starts traveling from Nakuru at 8.15 a.m towards Sotik at an average speed of 35km/hr. At what time will the two cars meet?
Date posted: September 19, 2019.
- Tunga sentensi kwa kutumia nomino katika ngeli ya pa- ku- mu.(Solved)
Tunga sentensi kwa kutumia nomino katika ngeli ya pa- ku- mu.
Date posted: September 19, 2019.
- A variable P varies as the square of Q and inversely as square root of R. Find the percentage change in P when Q is...(Solved)
A variable P varies as the square of Q and inversely as square root of R. Find the percentage change in P when Q is increased by 5% and R reduced by 19%.
Date posted: September 19, 2019.