book Maths Puzzle Numerical Ability

Rationalize the Denominator

"variable a" divided by the cubic root of 4.

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book Other Question

solve by graphing.

#1

x-y=3
x+y=5

#2

x+2y=6
2x-3y=26

#3

x=2y+4
y=2x-8

#4

x=y-1
3y=-2x-x -2x + y = 5
x - y = -3
graph help please