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- A form IV maths teacher originally worked out the mean mark of her 30 students to be 41. After the correction of the test, she...(Solved)
A form IV maths teacher originally worked out the mean mark of her 30 students to be 41. After the correction of the test, she added some marks of the test, she added some marks to Njoki,Chelimo and Nafula in the ratio 2:3:4,if the new mean mark for the class is 42.5 determine how many more marks Nafula was added than Chelimo.
Date posted: August 14, 2019. Answers (1)
- Solve for x in the equation below.
9(x-1) X 3(2x+1) = 243(Solved)
Solve for x in the equation below.
9(x-1) X 3(2x+1) = 243
Date posted: August 14, 2019. Answers (1)
- Form the quadratic equation whose roots are x= -5/3 and x=1(Solved)
Form the quadratic equation whose roots are x= -5/3 and x=1
Date posted: August 14, 2019. Answers (1)
- Nyongesa spends a total of sh.970 on buying 3 text books and 5 pens. If he had bought 2 text books and 5 pens he...(Solved)
Nyongesa spends a total of sh.970 on buying 3 text books and 5 pens. If he had bought 2 text books and 5 pens he would have saved sh.90. Find the cost of one text book.
Date posted: August 14, 2019. Answers (1)
- An open right circular cone has radius of 5cm and a perpendicular height of 12cm .Calculate the surface area of the cone.(Take pi to be 3.14)(Solved)
An open right circular cone has radius of 5cm and a perpendicular height of 12cm .Calculate the surface area of the cone.(Take pi to be 3.14)
Date posted: August 14, 2019. Answers (1)
- Evaluate without using mathematical tables(Solved)
Evaluate without using mathematical tables
Date posted: August 14, 2019. Answers (1)
- A surveyor recorded the measurements of a field in a field book using lines AB 260m as shown below.(Solved)
A surveyor recorded the measurements of a field in a field book using lines AB 260m as shown below.
a) Sketch the map of the field.
b) Find the area of the field in hectares.
Date posted: August 14, 2019. Answers (1)
- In the figure below E is the mid point of BC. AD: DC 3:2 and F is the meeting point of BD and AE.If AB...(Solved)
In the figure below E is the mid point of BC. AD: DC 3:2 and F is the meeting point of BD and AE.
If AB = b and AC = c
i) BD
ii) AE
b) If BF = t BD and AF = n AE. Find the value of t and n.
c) State the ratio of BD to BF.
Date posted: August 14, 2019. Answers (1)
- A group of people planned to contribute equally towards a water project which needed kshs. 2,000,000 to complete. However, 40 members of the group withdrew...(Solved)
A group of people planned to contribute equally towards a water project which needed kshs. 2,000,000 to complete. However, 40 members of the group withdrew from the project. As a result, each of the remaining members were to contribute ksh 2500 more.
(a) Find the original number of members in the group.
(b) Forty five percent of the value of the project was funded by Constituency Development Fund (CDF). Calculate the amount that would be made by each of the remaining members of the group.
(c) Members contribution were in terms of labour provided and money contributed. The ratio of the value of labour to the money contributed was 6:19, calculate the total amount of money contributed by the members.
Date posted: August 14, 2019. Answers (1)
- B is 102km on the bearing of 112° from A. C is 94km on the bearing of 062° from B D is 073°from A and...(Solved)
B is 102km on the bearing of 112° from A. C is 94km on the bearing of 062° from B D is 073° from A and 336° from C.
(a) Using a scale of 1cm to represent 20km,draw a diagram to show the positions of A,B,C and D.
(b) Using your diagram, determine;
i) The bearing of B from D and A from C.
ii) The distance AC and BD
Date posted: August 14, 2019. Answers (1)
- The vertices of a triangle are A(2,5), B(4,3) and C(2,3). H represents a half turn rotation about the point (0,2).
a) Draw triangles ABC and A',B',C'...(Solved)
The vertices of a triangle are A(2,5), B(4,3) and C(2,3). H represents a half turn rotation about the point (0,2).
a) Draw triangles ABC and A',B',C' under H
b)T represents a reflection in the line x = 0 and K represents a translation 
.Find the coordinates of A” , B”,C” of A’, B’,C’ under TK. Hence draw triangle A”B”,C”.
c) Find the area of triangle A”,B”,C’
Date posted: August 14, 2019. Answers (1)
- An aircraft flying at 800 knots leaves airport A(600N,120E) at 9am local time for airport B (600N,880W) along the parallel of latitude. Find the local...(Solved)
An aircraft flying at 800 knots leaves airport A(600N,120E) at 9am local time for airport B (600N,880W) along the parallel of latitude. Find the local time at B when the plane lands.
Date posted: August 14, 2019. Answers (1)
- Solve for m in;
Log5 – 2 + (2m+10) = log (m-4)(Solved)
Solve for m in;
Log5 – 2 + (2m+10) = log (m-4)
Date posted: August 14, 2019. Answers (1)
- Two similar containers have base areas 25cm2 and 324cm2 respectively. Calculate the Capacity of the larger container correct to one decimal place if the capacity...(Solved)
Two similar containers have base areas 25cm2 and 324cm2 respectively. Calculate the Capacity of the larger container correct to one decimal place if the capacity of the smaller one is 8cm3
Date posted: August 14, 2019. Answers (1)
- In the figure below ED and EA are tangents to the circle at D and A. DC is parallel to AB and0. Calculate the...(Solved)
In the figure below ED and EA are tangents to the circle at D and A. DC is parallel to AB and 0. Calculate the value of x.
Date posted: August 14, 2019. Answers (1)
- Two trains T1 and T2, traveling in opposite directions on parallel tracks are just beginning passone another. Train T1 is 72metres long and is traveling...(Solved)
Two trains T1 and T2, traveling in opposite directions on parallel tracks are just beginning pass one another. Train T1 is 72metres long and is traveling at 108km/hr.T2 is 78 metres Long and traveling at 72km/hr. Find the time in seconds the two take to completely pass one another.
Date posted: August 14, 2019. Answers (1)
- Without using a calculate or mathematical table, evaluate.(Solved)
Without using a calculate or mathematical table, evaluate.
Date posted: August 14, 2019. Answers (1)
- Pipe A empties a full tank in 8 hours, pipe B empties in 6 hours and pipe C empties in 3 hours. If all the three...(Solved)
Pipe A empties a full tank in 8 hours, pipe B empties in 6 hours and pipe C empties in 3 hours. If all the three pipes are open for 30 minutes and then pipe A closed , How long will it take to empty a full tank.
Date posted: August 14, 2019. Answers (1)
- Find the integral values of x for which:
-6 < 3x + 3
14 – 3x >2(Solved)
Find the integral values of x for which:
-6 < 3x + 3
14 – 3x >2
Date posted: August 14, 2019. Answers (1)
- Find the equation of a perpendicular bisector of a line AB if the coordinates of A and B are(-4,-2) and (6,2) respectively.(Solved)
Find the equation of a perpendicular bisector of a line AB if the coordinates of A and B are (-4,-2) and (6,2) respectively.
Date posted: August 14, 2019. Answers (1)