Solve For R?? and X???

Question

37) What is the value of "r"?

38) What is the value of "x"?

40) What is the value of "r"?

[[ CLICK HERE TO SEE THE PROBLEM.... THEIR IN ORDER]]]

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Answer 1

37) r = -8

38) x = 1331

40) r = 9

Answer 2

37) just do cbrt512 and make it negative. its -8

38) 11^3=x

x=1331

39) r=9

make it a good day