exam Maths Puzzle Numerical Ability

How do you substitute variables if you are doing a double variable questions?

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exam Other Question

graph each quadratic inequality.
1. y>x^2

2.f(x)<-x^2

3.y < or = x^2t3

4.y<-x^2+4

5.y > or = -2x^2+6

6.f(x)>-x^2+4x-4 Can someone help me to solve the equation?

square root of x + 5 + x = 1