exam Maths Puzzle Numerical Ability

Hello! I am having problems with a couple of problems and need some help.

Simplify: 50+ square root of 50 over 5

and also solve: Square root 5x+5 -15=0

Thank you for the help

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exam Other Question

x-8/x+5 / x-9/x+4 Question

a) Given PRS and PQR are triangles. QR = 30 cm. Find PS.
b) PTQ, PMR and PMS are all triangles. PS = QR while PQ = RS. PQ = 24 cm while RS = 24 cm. Find PT.

Please help to solve this question. Thank you.