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3 years ago

How do you solve Walt grew 10 centimeters in 1 year he is now 1.6 m tall how tall was he 1 year ago

1 answer:

5 0

If he grew 10 cm in 1 yr.....he would be 10 cm less then he is now.

1 m = 100 cm......so 1.6 m = (1.6 x 100) = 160 cm.

so he is 160 cm now......and 1 yr ago, he would be (160 - 10) = 150 cm....or 1.5 m.

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timama [110]

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By the quadratic formula,

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Then

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$\implies\dfrac{x^2}{(x^2+1)^2}=\dfrac{\frac{3\pm\sqrt5}2}{\frac{15\pm5\sqrt5}2}=\dfrac{3\pm\sqrt5}{15\pm5\sqrt5}$

Multiply numerator and denominator by the denominator's conjugate:

$\dfrac{3\pm\sqrt5}{15\pm5\sqrt5}\cdot\dfrac{15\mp5\sqrt5}{15\mp5\sqrt5}=\dfrac{45\pm15\sqrt5\mp15\sqrt5-25}{15^2-(5\sqrt5)^2}=\dfrac{20}{100}=\dfrac15$

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Tems11 [23]

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