exam Maths Puzzle Numerical Ability

help! another one needed!
Write the first four terms in the binomial expansion of (m-n)^11, and expressing the result in simplified form

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exam Other Question

X2+Y2=25
Is solving this problem considered a function?

How do I plot a graph using a smooth curve for this problem?

Ed
Could I please get some help with the following problem:

there is a diagram of a triangle
one side is = 1, another side is = 4 and there is 100 degree angle
I am looking for the value of side C

thank you,
RF