exam Maths Puzzle Numerical Ability

V multipled by P= v and it can not be zero

8 multiplyed by Z=P and it can not be 1

v+5 =t

t+p=p

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exam Other Question
A restaurant has some pancake batter that is too thin. It weighs 12 kilograms and contains 85% flour. How many kilograms of flour should be added so that the final mixture is 90% flour? Could someone please help?

Graph y=2x^2-4x-6
Label all x-intercepts,y-intercepts, and the vertex.

Thank you