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- 3cm3 of water is added to 2cm3 of a certain medicine which cost sh.12 per cm3. The chemist sells the diluted medicine at sh.4.50 per...(Solved)
3cm3 of water is added to 2cm3 of a certain medicine which cost sh.12 per cm3. The chemist sells the diluted medicine at sh.4.50 per cm3. Calculate the percentage profit.
Date posted: August 30, 2019. Answers (1)
- A contractor employs 40 men to do a piece of work in 60 days each man working 9 hours a day. He is then requested...(Solved)
A contractor employs 40 men to do a piece of work in 60 days each man working 9 hours a day. He is then requested to do the job in 48days. How many more men working l0 hours a day does he need to employ.
Date posted: August 30, 2019. Answers (1)
- Make P the subject of the formula given.(Solved)
Make P the subject of the formula given.
Date posted: August 30, 2019. Answers (1)
- The data below shows marks scored by 8 form four students in Ikutha district mathematics contest 44,32,67. 52, 28, 39, 46, 64.Calculate the mean absolute...(Solved)
The data below shows marks scored by 8 form four students in Ikutha district mathematics contest 44,32,67. 52, 28, 39, 46, 64.Calculate the mean absolute deviation.
Date posted: August 30, 2019. Answers (1)
- Write in the simplest form using a rational denominator.(Solved)
Write in the simplest form using a rational denominator.
Date posted: August 30, 2019. Answers (1)
- a) Write down the first five terms of the expansion of
b) Using the first three terms of the expansion. Find the values of (1.01)5...(Solved)
a) Write down the first five terms of the expansion of
b) Using the first three terms of the expansion. Find the values of (1.01)5 to 4dp.
Date posted: August 30, 2019. Answers (1)
- By use of logarithms evaluate;(Solved)
By use of logarithms evaluate;
Date posted: August 30, 2019. Answers (1)
- The diagram below not drawn to scale shows part of the curve y = x2 + 5 and the line y = 8 – 2x....(Solved)
The diagram below not drawn to scale shows part of the curve y = x2 + 5 and the line y = 8 – 2x. The line intersects the curve at a point C and D. Lines AC and BD are parallel to the y-axis.
(a) Determine the coordinates of C and D
(b) Use integration to calculate the area bounded by the curve and x – axis between the points C and D.
(c) Calculate the area enclosed by the lines CD, CA, BD and the x-axis.
(d)Hence determine the area of the shaded region.
Date posted: August 30, 2019. Answers (1)
- (a) Construct rectangle ABCD with side AB = 6.4cm and diagonal AC = 8cm.
(b)Locus, L1, is a set of points equidistant from A and...(Solved)
(a) Construct rectangle ABCD with side AB = 6.4cm and diagonal AC = 8cm.
(b)Locus, L1, is a set of points equidistant from A and B and locus, L2, is a set of points equidistant
from BC and BA. If L1 and L2 meets at N inside the rectangle, locate point N.
(c)A point x is to be located inside the rectangle such that it is nearer B than A and also nearer AB than BC. If its not greater than 3cm from N shade the region where the points could be located.
Date posted: August 30, 2019. Answers (1)
- A ship sailed from a point P (50S, 120E) northwards to port Q(50N, 120E) then onto port R (50N, 140W).
(a)Calculate the distance in nm between
(i)P...(Solved)
A ship sailed from a point P (50S, 120E) northwards to port Q(50N, 120E) then onto port R (50N, 140W).
(a)Calculate the distance in nm between
(i)P and Q
(ii)Q and R
(b) If the speed of the ship between P and Q was 50 knots and between Q and R was 74 knots, how long did it take the ship to sail from point P to port R.?
Date posted: August 30, 2019. Answers (1)
- The curve y = 2x2 – 6x + 9 passes through the point P(2, 5)
(a) Determine the gradient function of the curve.
(b) Determine the coordinates...(Solved)
The curve y = 2x2 – 6x + 9 passes through the point P(2, 5)
(a) Determine the gradient function of the curve.
(b) Determine the coordinates and nature of the turning point of the curve
(c) Find the equation in the form y = mx + c of the
(i)Tangent to curve at P
(ii) Normal to the curve at P
Date posted: August 30, 2019. Answers (1)
- A form four class at Kiptulwo secondary school has 15 girls and 25 boys. The probability of a girl completing the secondary school course is...(Solved)
A form four class at Kiptulwo secondary school has 15 girls and 25 boys. The probability of a girl completing the secondary school course is 3/5 and that of a boy is 4/5.
(a) A student is picked at random from the class. Find the probability that;
(i)The student picked is a girl and will complete the course.
(ii) The student will not complete the course.
(b)Two students are picked at random from the class. Find the probability that;
(i) Both are girls
(ii)Both are of the same gender and will complete the course.
Date posted: August 30, 2019. Answers (1)
- A fundi makes two types of overalls, A and B. Overall A requires 2½ meters of material while overall B requires 3 metres of material....(Solved)
A fundi makes two types of overalls, A and B. Overall A requires 2½ meters of material while overall B requires 3 metres of material. The fundi uses not more than 600 meters of material in making both overalls.The fundi must make not be more than 80 overall of type A and not less than 100 of type B each day.
(a) Write down four inequalities to represent the above information.
(b) Draw inequalities and shade the unwanted regions.
(c) If the business makes a profit of shs. 80 on garment A and a profit of shs.60 on garment B, how many garments of each type must he make to maximize its total profit? Hence find maximum profit.
Date posted: August 30, 2019. Answers (1)
- The figure below shows right pyramid with a rectangular base measuring 12cm by 8cm. the length of the slant edge is 15cm. X is the...(Solved)
The figure below shows right pyramid with a rectangular base measuring 12cm by 8cm. the length of the slant edge is 15cm. X is the midpoint of RS and OY is the perpendicular height of the pyramid.
Determine
(i) The length of XY
(ii) The angle between RSY and PQRS.
Date posted: August 30, 2019. Answers (1)
- The sum of the first four terms of an arithmetic sequence is 18. If the 10th term is 42 find;
(a) The first term of the...(Solved)
The sum of the first four terms of an arithmetic sequence is 18. If the 10th term is 42 find;
(a) The first term of the sequence.
(b) The sum of the first ten terms of the sequence.
Date posted: August 30, 2019. Answers (1)
- The table below shows the number of defective bolts from a sample of 40.Calculate the standard deviation of the data above.(Solved)
The table below shows the number of defective bolts from a sample of 40.Calculate the standard deviation of the data above.
Date posted: August 30, 2019. Answers (1)
- Kibet took a co-operative loan which is charged at 12% p.a. Compound interest to be repaid in three years. If in each month he repays...(Solved)
Kibet took a co-operative loan which is charged at 12% p.a. Compound interest to be repaid in three years. If in each month he repays sh.11,240; how much was the loan that he had taken from the co-operative to the nearest thousand.
Date posted: August 30, 2019. Answers (1)
- Solve the simultaneous equations
3x + 2y = 7
x2 + y2 – 2x – 4y – 8 = 0(Solved)
Solve the simultaneous equations
3x + 2y = 7
x2 + y2 – 2x – 4y – 8 = 0
Date posted: August 30, 2019. Answers (1)
- OAB is a sector of a circle centre O and radius 7cm. Arc AB subtends 250 at the center and C is a point on...(Solved)
OAB is a sector of a circle centre O and radius 7cm. Arc AB subtends 250 at the center and C is a point on OB such that OCA is 900. Calculate the area of the shaded region
Date posted: August 30, 2019. Answers (1)
- Two chord AB and CD of a circle intersect inside a circle at X. Given that AX = 4.2cm, XB = 3cm and XD =...(Solved)
Two chord AB and CD of a circle intersect inside a circle at X. Given that AX = 4.2cm, XB = 3cm and XD = 2.1 cm. Find the length of CX.
Date posted: August 30, 2019. Answers (1)