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- A form four class has 13 girls and 7 boys. The mean mark for the 13 girls is 48% while the mean mark for the...(Solved)
A form four class has 13 girls and 7 boys. The mean mark for the 13 girls is 48% while the mean mark for the whole class is 41%. Calculate the mean mark for the 7 boys.
Date posted: August 20, 2019. Answers (1)
- Solve the equation 2x² + 3x = 5 by completing the square method.(Solved)
Solve the equation 2x² + 3x = 5 by completing the square method.
Date posted: August 20, 2019. Answers (1)
- Given that 5x = 7y, find the ratio x : y(Solved)
Given that 5x = 7y, find the ratio x : y
Date posted: August 20, 2019. Answers (1)
- Find the possible values of x in the equation 9x2 = 27(2x+ 12)(Solved)
Find the possible values of x in the equation 9x2 = 27(2x+ 12)
Date posted: August 20, 2019. Answers (1)
- A car traveling at 104km/hr is 297m behind another car traveling at 71km/hr in the same direction. How long does it take the faster car...(Solved)
A car traveling at 104km/hr is 297m behind another car traveling at 71km/hr in the same direction. How long does it take the faster car to overtake the slower one?.
Date posted: August 20, 2019. Answers (1)
- The equation of line AB in the figure below is y = 3x + 5 and A is the point (0, a).(Solved)
The equation of line AB in the figure below is y = 3x + 5 and A is the point (0, a). Line PQ is parallel to AB and AP = 7 units.
(i) Find the value of a.
(ii) Write down the equation of PQ.
Date posted: August 20, 2019. Answers (1)
- Evaluate:(Solved)
Evaluate:
Date posted: August 20, 2019. Answers (1)
- In the figure below EFGH is a rhombus and DEF is a quilaterial triangle. Calculate ?HDG giventhat ?HED = 20o(Solved)
In the figure below EFGH is a rhombus and DEF is a quilaterial triangle. Calculate ?HDG given that ?HED = 20o
Date posted: August 19, 2019. Answers (1)
- Use tables of square, square roots and reciprocals to evaluate. Showing every step in your working.(Solved)
Use tables of square, square roots and reciprocals to evaluate. Showing every step in your working.
Date posted: August 19, 2019. Answers (1)
- A parallelogram OACB is such that OA = a, OB = b.(Solved)
A parallelogram OACB is such that OA = a, OB = b. D is the mid point of BC OE = hOC and AE = kAD.
(a) Express the following in terms of a, b, h and k.
(i) OC
(ii) OE
(iii) AD
(iv) AE
(b) Find the values of h and k.
(c) Determine the ratios:
(i) AE : ED
(ii) OE : OC
Date posted: August 19, 2019. Answers (1)
- (a) Complete the table below for the function y = -4 – 6x + 3x2 + 2x3.(Solved)
(a) Complete the table below for the function y = -4 – 6x + 3x2 + 2x3.
(b) Draw the graph of y = -4 – 6x + 3x2 + 2x3 for values for x from -4 to 2.
(c) Use your graph to solve.
(i) 2x3 + 3x3 – 4x – 2 = 0
(ii) 4x3 + 6x3 - 12x – 8 = 0
Date posted: August 19, 2019. Answers (1)
- The velocity of a particle t seconds after passing a fixed point O, is given by V = at2 + bt m/s, where a and...(Solved)
The velocity of a particle t seconds after passing a fixed point O, is given by V = at2 + bt m/s, where a and b are constants. Given that its velocity is 2 m/s when t = 1 sec and it returns to 0 when t = 4.5 secs, calculate;
(a) The values of a and b.
(b) Hence find;
(i) The values of t when the particle is instantaneously at rest.
(ii) The total distance traveled by the particle during the first 4 seconds
(iii) The maximum velocity attained by the particle
Date posted: August 19, 2019. Answers (1)
- A bus left town x at 10:45 am and traveled towards town Y at an average speed of 60 km/hr.(Solved)
A bus left town x at 10:45 am and traveled towards town Y at an average speed of 60 km/hr. A car left town X at 11:15am on the same day and traveled along the same road at an average speed of 100 km/hr. The distance between town X and town Y is 500 km.
(i) Determine the time of day when the car overtook the bus.
(ii) Both vehicles continued towards town Y at their original speeds. Find how long the car had to wait in town Y before the bus arrived.
Date posted: August 19, 2019. Answers (1)
- The figure shows a velocity time graph of an object which accelerates from rest to a velocity Vm/s then decelerates to rest in a total...(Solved)
The figure shows a velocity time graph of an object which accelerates from rest to a velocity Vm/s then decelerates to rest in a total time of 54 seconds. If the whole journey is 810 m,
(i) Find the value of V.
(ii) Find the deceleration given the initial acceleration is 1 2/3 m/s2.
Date posted: August 19, 2019. Answers (1)
- Eunice bought some oranges worth Ksh 45, while Sharon spent the same amount of money but bought the oranges at a discount of 75 cents...(Solved)
Eunice bought some oranges worth Ksh 45, while Sharon spent the same amount of money but bought the oranges at a discount of 75 cents per orange.
(a) If Eunice bought an orange at Sh x, write down a simplified expression for the total number of oranges bought by Eunice and Sharon.
(b) If Sharon bought 2 more oranges than Eunice. Find how much each spent on an orange.
(c) Find the total number of oranges bought by Eunice and Sharon.
Date posted: August 19, 2019. Answers (1)
- Four trucks A, B, C and D take 10 days to transport 42,000 bags of maize to a depot.(Solved)
Four trucks A, B, C and D take 10 days to transport 42,000 bags of maize to a depot. However, trucks A and B together take 30 days to transport the same number of bags while trucks C and D together take 15 days. Truck A carries 1.5 times the number of bags B carries and C carries 1 and four fifths times as much as D.
(a) Determine the number of bags of maize transported by each truck per day.
(b) All the trucks A, B C and D work together for 5 days, after which truck C and D are withdrawn. A and B work together for another 5 days after which truck A breaks down. How long does truck B take to complete the rest of the remaining bags?
Date posted: August 19, 2019. Answers (1)
- A frustum with a regular pentagonal base is such that its top is of side 12cm and bottom is of side 24cm.(Solved)
A frustum with a regular pentagonal base is such that its top is of side 12cm and bottom is of side 24cm. If its perpendicular height is 20cm. Calculate:
(a) The length of the slant edge.
(b) The volume of the frustum
Date posted: August 19, 2019. Answers (1)
- Three business partners Kamau, Tatwa and Makau contributed Ksh. 100,000, Ksh.80,000 and ksh. 50,000 respectively to start a business. After one year the business realized...(Solved)
Three business partners Kamau, Tatwa and Makau contributed Ksh. 100,000, Ksh.80,000 and ksh. 50,000 respectively to start a business. After one year the business realized a profit which they shared in the ratio of their contributions.
(a) If Makau’s share of profit was Kshs.20, 000, how much was the total amount of profit?
(b) At the beginning of the second year, Makau boosted his shares by Ksh. 10,000. If the business
profit increased by 20% at the end of the second year. Calculate;
(i) Kamau’s share of the profit.
(ii) The difference between Kamau’s and Tatwa’s share of the profit.
Date posted: August 19, 2019. Answers (1)
- Without using mathematical tables or calculator, evaluate:(Solved)
Without using mathematical tables or calculator, evaluate:
Date posted: August 19, 2019. Answers (1)
- A pulley is made up of two wheels of radii 6 cm and 9 cm respectively and the distance between their centres is 18 cm.(Solved)
A pulley is made up of two wheels of radii 6 cm and 9 cm respectively and the distance between their centres is 18 cm.
If a belt passes round the two pulleys, find its length.
Date posted: August 19, 2019. Answers (1)