exam Maths Puzzle Numerical Ability

please help me to

simplify

-6 * square root of 2(5*square root of 2 - 5 times the square root of 10)

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exam Other Question

how do I graph this?

x2 + y2 = 1 Simple Anova
Exercise 12.7

(a) Use Excel, MegaStaqt, or Minitab to calculate a matrix of correlation coefficients.
(b) Calculate the critical valu