exam Maths Puzzle Numerical Ability

The instructions are as follows:

Simplify. 7 is outside of the square root and 245 is inside the square root.

Please show the step by step process. Thank you for your help on this one.

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exam Other Question

-6n= 2 3/4

Solve for n

2 3/4 is the mixed number two and three fourths.

Thanks I had asked my teacher for help and she gave me none! Please help.

(Type of problem: Linear Programming in Two Variables, Operation Research, Simplex Method)
x sub1=bread and