book Maths Puzzle Numerical Ability

if x=5 what is 2x+5/x

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book Other Question

how do i graph -5 is less than x less than or equal to 7 on a line plot?
PLEASE ANSWER BACK ASAP!!!!!!!!!!! Please help me solve this equation:What are the foci of the ellipse with the equation {{{2x^2+y^2=10}}}