- Factorise xy – zy – xw + zw hence simplify the expression completely.(Solved)
Factorise xy – zy – xw + zw hence simplify the expression completely.
Date posted: September 10, 2019. Answers (1)
- Given the matrix(Solved)
Given the matrix 
(a) Determine y2
(b) If y2 = I, determine the possible values of c and d.
Date posted: September 10, 2019. Answers (1)
- Expand (v5 + v3) (v5 – v3) hence or otherwise simplify by rationalising the denominator of (Solved)
Expand (√5 + √3) (√5 – √3) hence or otherwise simplify by rationalising the denominator of
Date posted: September 10, 2019. Answers (1)
- The diagonal of a rectangular flower garden is 20m.(Solved)
The diagonal of a rectangular flower garden is 20m. If the width of this garden is 8m, calculate its length and perimeter to 4 s.figures.
Date posted: September 10, 2019. Answers (1)
- The diagram below shows the region enclosed by inequalities.(Solved)
The diagram below shows the region enclosed by inequalities.
Determine the inequalities that defines the regions R.
Date posted: September 10, 2019. Answers (1)
- The column vectors of b, c and d are given as:(Solved)
The column vectors of b, c and d are given as:
respectively and that P = b + 2c – d. Express vector P as a column vector and hence calculate the magnitude of P.
Date posted: September 10, 2019. Answers (1)
- Given that in a right angled triangle, sin ? = 5/12, find:(Solved)
Given that in a right angled triangle, sin theta = 5/12, find:
Cos (900 – θ)
Date posted: September 10, 2019. Answers (1)
- A tourist visited Kenya with 2500 U.S dollars and changed the U.S dollars into Kenya Shillings at a local bank in Kenya when the exchange...(Solved)
A tourist visited Kenya with 2500 U.S dollars and changed the U.S dollars into Kenya Shillings at a local bank in Kenya when the exchange rates at the time were as follows:
(a) How much did he get in Kenya shillings?
(b) While in Kenya, he used Shs. 80,000 and after his stay he converted the remaining amount into sterling pounds. Calculate, to 2 decimal places, the Sterling Pounds that he got.
Date posted: September 10, 2019. Answers (1)
- Without using a calculator, evaluate:(Solved)
Without using a calculator, evaluate:
Date posted: September 10, 2019. Answers (1)
- Three boats X, y and Z are approaching a harbour H. X is 50km from the harbour on a bearing of 090°.(Solved)
Three boats X, y and Z are approaching a harbour H. X is 50km from the harbour on a bearing of 090°. Y is 80km from the harbour on a bearing of 130° and Z is due West of Y and on a bearing of 200° from the harbour.
(a) Using a scale of 1cm rep 10km make a scale drawing showing the positions of the three boats relative to the harbour.
(b)
(i) Using the scale drawing find; the distance between X and Y.
(ii) The distance of Z from the harbour
(iii) The distance between X and Z.
(iv) The compass bearing of X from Z.
Date posted: September 6, 2019. Answers (1)
- In the diagram below A is the point (2, 2)(Solved)
(ii) The coordinates of B.
(b) The point C is (9, 1) and CD = 3AB. Find
(i) the coordinates of D.
(c) The point E is (K, 4)
(i) Find in terms of K, the vector AE.
(ii) Give that AED is a straight line, find K.
Date posted: September 6, 2019. Answers (1)
- Determine the values of x where the curve y = x² - 2x - 3(Solved)
(a) Determine the values of x where the curve y = x² - 2x - 3 cuts the x-axis.
(b) Using the mid-ordinate rule with four ordinates, estimate the area enclosed by the curve
y = x² - 2x - 3 and the x-axis
(c) Calculate the same area using integration method.
(d) Taking the area obtained by integration to be the exact area of the region, calculate the percentage error made when the mid-ordinate rule is used.
Date posted: September 6, 2019. Answers (1)
- The image of point A (-3, 4) under a translation, T is A¹ (2, -2).(Solved)
The image of point A (-3, 4) under a translation, T is A¹ (2, -2). If the image of a point B under
T is (0, -1). Find the coordinates of B.
Date posted: September 6, 2019. Answers (1)
- Without using Mathematical tables or a calculator evaluate:(Solved)
Without using Mathematical tables or a calculator evaluate:
Date posted: September 6, 2019. Answers (1)
- A forex bureau buys and sells American dollars in Kenya shillings at the rate shown below.(Solved)
A forex bureau buys and sells American dollars in Kenya shillings at the rate shown below.
Buying........Selling
85.40..........86.00
An American tourist at the end of her tour in Kenya had Ksh.107500 which he converted to the dollar through the forex bureau. How many dollars did she get?
Date posted: September 6, 2019. Answers (1)
- There are two grades of tea, grade A and grade B.(Solved)
There are two grades of tea, grade A and grade B. Grade A cost Kshs.80 per kg and grade B cost Ksh.60 per kg. In what ratio must the two grades be mixed order to produce a blend worth Ksh.75 per kg.
Date posted: September 6, 2019. Answers (1)
- A solid hemisphere of radius 7cm has the same volume as a cube.(Solved)
A solid hemisphere of radius 7cm has the same volume as a cube. Find the length of the cube to 1 d.p.
Date posted: September 6, 2019. Answers (1)
- Martha has 26 coins whose total value is sh.205.(Solved)
Martha has 26 coins whose total value is sh.205. There are thrice as many Sh.10 coins as there are
Sh.20 coins. The rest are 50cts coins. Find the number of Sh.20 coins that Martha has.
Date posted: September 6, 2019. Answers (1)
- Simplify:(Solved)
Simplify:
Date posted: September 6, 2019. Answers (1)
- Line L1 passes through the points (-1, 3) and (3, -5).(Solved)
Line L1 passes through the points (-1, 3) and (3, -5). Line L2 is parallel to L1 and has a perpendicular
bisector at (-2, 4). Find the equation of the perpendicular bisector in the form ax + by = C
Date posted: September 6, 2019. Answers (1)