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21-03-2017
Mathematics

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what does X have to be to make this correct 5x*9x=1350

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Doctorflame11 Doctorflame11

21-03-2017

x would have to be 30 to complete this problem 5 x 30 = 150 x 9 = 1350

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21-03-2017

5x * 9x = 45x^2
45x^2 = 1350
divide both sides by 45
x^2 = 30
take the sqrt of each side
x = sqrt 30

CHECK (5sqrt30) * (9sqrt30) = 45 * 30 = 1350

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