book
Maths Puzzle
Numerical Ability
Could you please help me solve these problems..
x+7y=21
y=1/4x+2
y=-2/3x+4
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book Other Question
Show that the points(5,7), (3,9) and (6,8) are the vertices of a right triangle.
can use distance formula or slope.
use the properties of logarithms to condense the following expression:
1) 3 ln x + 2 ln (x+1)