x2 - xy - 12y2
P = -12, S = -1, N = 3, -4
(x - 4y)(x + 3)
therefore L.C.M of x2 - xy - 12y2
and x -4y is (x - 4y)(x + 3y)
= $\frac{7 - 1(x + 3y)}{x^2 - xy - 12y^2}$
= $\frac{7 - x - 3y}{(x - 4y)(x + 3y)}$
johnmulu answered the question on March 2, 2017 at 13:13
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Heline left town A at 8. 00 a.m and traveled towards town B at an average speed of 64 km/hr. Half an hour later Joyce left town B and traveled towards town A at the same speed. If the two towns are 384 km apart:
(Solved)
Heline left town A at 8. 00 a.m and traveled towards town B at an average speed of 64 km/hr. Half an hour later Joyce left town B and traveled towards town A at the same speed. If the two towns are 384 km apart:
a) At what time did they meet?
b) How far from town B was their meeting point?
c) How far apart were they at 10.30 a.m?
Date posted:
March 2, 2017
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Answers (1)
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a) Divide 1 000 cm3 in the ratio of
(Solved)
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Date posted:
March 2, 2017
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Answers (1)
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Water flows through a circular pipe of cross-sectional area 6.16 cm2 at a uniform speed of 10 cm/sec. At 6. 00 a.m water starts flowing through the pipe into an empty tank of base area 3 m2.
(Solved)
Water flows through a circular pipe of cross-sectional area 6.16 cm2 at a uniform speed of 10 cm/sec. At 6. 00 a.m water starts flowing through the pipe into an empty tank of base area 3 m2.
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Date posted:
March 2, 2017
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Answers (1)
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ABCD is a parallelogram with A(1,1) and C(8, 10). The equation of AB is 4x - 5y = -1 and the equation of BC is 5x - 2y = 20. Determine
(Solved)
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Date posted:
March 2, 2017
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Answers (1)
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Point A(4, 4) maps onto point A1 (8, 10) under enlargement with linear scale factor 3. Find the coordinates of the centre of enlargement.
(Solved)
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Date posted:
March 2, 2017
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Answers (1)
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Determine the angle of elevation of the top of the building from A.
(Solved)
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Date posted:
March 2, 2017
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Answers (1)
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In order to complete a journey of 56 km, John walks for 1 hour at an average speed of V km/hr and then cycles for two hours at an average speed which is three times his walking speed. Calculate
(Solved)
In order to complete a journey of 56 km, John walks for 1 hour at an average speed of V km/hr and then cycles for two hours at an average speed which is three times his walking speed. Calculate:
a) V
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Date posted:
March 2, 2017
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Answers (1)
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In order to complete a journey of 56 km, john walks for 1 hour at an average speed of V km/hr at an..
(Solved)
In order to complete a journey of 56 km, john walks for 1 hour at an average speed of V km/hr at an average speed of V km/hr and then cycles for two hours at an average speed which is three times his walking speed. Calculate:
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Date posted:
February 15, 2017
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Answers (1)
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Evaluate the following without using mathematical tables
(Solved)
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Date posted:
January 26, 2017
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Answers (1)
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(Solved)
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January 26, 2017
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Answers (1)
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Simplify the following expression completely
(Solved)
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Date posted:
January 24, 2017
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Answers (1)
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An exchange bureau charges 5% commission for any transaction they do. An american tourist received Sh 408,000
(Solved)
An exchange bureau charges 5% commission for any transaction they do. An american tourist received Sh 408,000 when the exchange rates were as shown below
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Date posted:
January 24, 2017
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Answers (1)
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Write an expression in terms of x and y for the total value of a two digit number
(Solved)
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Date posted:
January 24, 2017
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Answers (1)
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Three ladies Agnes, Betty and Cate contributed a total amount of sh 21,000 to start a saloon. The ratio of Agnes to Betty was 3:5 and that of Betty to Cate was 2:1.
(Solved)
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Date posted:
January 24, 2017
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Answers (1)
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Simplify the equation $\frac{(wx - xy - wz + yz)(w + z)}{z^2 - w^2}$
(Solved)
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Date posted:
January 23, 2017
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Answers (1)
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The angle of elevation of the highest point of a building from two points S and T are 60o and 30o
(Solved)
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Date posted:
January 20, 2017
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Answers (1)
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ABCD is a rhombus whose diagonals BD and AC intersect at O. If BD = 10 cm and AC = 6 cm
(Solved)
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Date posted:
January 20, 2017
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Answers (1)
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(Solved)
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January 20, 2017
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Given that $6.5\le x \le 10$ and $2.5 \le y \le 4$ find:
(Solved)
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January 17, 2017
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Answers (1)
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The length of a rectangle is increased by 10% and the width by 20%. What is the percentage change in area?
(Solved)
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Date posted:
January 17, 2017
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Answers (1)