exam Maths Puzzle Numerical Ability

Hi, I am some trouble with two problems for my homework. I hope some one can help me please .

Perform the indicated operations:
2√[48] + 7√[12] �√[27]
Ra

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exam Other Question

If the circle with centre(0,m) has equation x^2+y^2+6y+5=0, what is the value of m? Q1. Please help me solve this Transposing question C= V2C1/V1-V2 to make "C" the subject.

Q2.Please help me solve this question - The power p developed in an electrical circui