Seven years ago, the age of a father was three times that...
Seven years ago, the age of a father was three times that of his son, but in six years time the age of the son will be half that of his father, representing the present ages of the father and son by x and y, respectively, the two equations relating x and y are
3y - x = 0; 2y - x = 0
3y - x = 14; x - 2y = 6
3y - x =7; x - 2y = 6
3y - x = 14; y - 2x = 6
x + 3y = 7; x = 2y = 12
Correct answer is B
7 years ago, Father(x - 7) years old, Son (y - 7) years x - 7 = 3(y - 7) x - 7 = 3y - 21 3y - x = -7 + 21 = 14 3y - x = 14 ... (1) In six years time, x + 6 = 2(y + 6) x + 6 = 2y + 12 2y + 12 = x + 6 12 - 6 = x - 2y 6 = x - 2y ... (2)
Given that y = 1 - \(\frac{2x}{4x - 3}\), find the value of x for which y is undefined ...
If a u2 - 3v2 and b = 2uv + v2 evaluate (2a - b)(a - b2), when u = 1 and v = -1...
Calculate the perimeter of the trapezium PQRS...
In the diagram above, O is the center of the circle of radius 3.5cm, ∠POQ = 60o Use the...
Two solid spheres have volumes 250cmo and 128cmo respectively. Find the ratio of their radii....
An arc of length 22cm subtends an angle of θ at the center of the circle. What is the value of...
A function f(x) passes through the origin and its first derivative is 3x + 2. What is f(x)? ...
The angle of a sector of a circle, radius 10.5cm, is 48°, Calculate the perimeter of t...
Find the probability that a number selected at random from 41 to 56 is a multiply of 9...