Let us consider that Christopher is 'x' years old
Age of Christopher = x
George is 8 years more than Christopher
Age of George = (x + 8)
Ford is 2 years younger than Christopher
Age of Ford = (x - 2)
Now the sum of their ages is 60
∴ x + (x + 8) + (x - 2) = 60
3x + 6 = 60
3x = 60 - 6
3x = 54
x = 54 ÷ 3
x = 18
Age of Christopher = x = 18 years
Age of George = (x + 8) = 18 + 8 = 26 years
Age of Ford = (x - 2) = 18 - 2 = 16 years
The sum of all their ages = 18 + 26 + 16 = 60 years
Answer:
y=-4x-8
Step-by-step explanation:
use the equation y-y1=m(x-x1) and solve for y
Answer:
perimeter is adding so add all the sides
Step-by-step explanation:
The answer would be 49m^2
Answer:
x = - 4 , x = - 3
Step-by-step explanation:
- 7x = x^2 + 12
Take all terms to one side of equation.
x^2 + 7x + 12 = 0
Find which 2 numbers multiply to give 12 and add to give 7.
a × b = 12
a + b = 7
a = 4
b = 3
Split the middle term using these 2 numbers.
x^2 + 4x + 3x + 12 = 0
Factorise each pair of terms separately.
x ( x + 4 ) + 3 ( x + 4 ) = 0
Bring out common factor of ( x + 4 ) and factorise.
( x + 4 ) ( x + 3 ) = 0
Using the Null factor law, make the expressions in each pair of parentheses equal 0.
x + 4 = 0
x = - 4
AND
x + 3 = 0
x = - 3
THEREFORE:
x = - 4 , x = - 3
