exam Maths Puzzle Numerical Ability

In order for the following fraction to be defined, what value(s) can x not assume?

7/[(2/x)-(3/5)]

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exam Other Question

graph f defined on the domain -1<x<4 as follows

f(x) =x^2+1 for -1<x<1 and sqrtx-1 for 1<x<4
Could I please have help with this question?

Write an Absolute Value Inequality to describe each graph

Number Line: ______________________._______________________.___________