exam Maths Puzzle Numerical Ability

Find the solution of using substitution, elimination or Cramers Rule
x^2+y^2=7
x-y^2=-1

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exam Other Question

[11+2x]=5, [8x+1]=23, [1/2x-3]=2 how do i solve these equations? jon oppened a package of candies and counted them. he found 60 candies in the 1.69ounce package.

estimate the number of candies in a 1-pound (16ounce) bag. explain your thinking