2 years ago

A meteorologist was accurate 90% of the time, reporting accurately for 45 days. How many days of weather did he report

Mathematics

1 answer:

ludmilkaskok [199]2 years ago

5 0

50 days i think so mate

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grigory [225]

$9x^{2} + 4y^{2} =144$
$x^{2} + y^{2}=24$

$9x^{2} + 4y^{2} =144$
$4x^{2} + 4y^{2}=96$
by the difference
5 $x^{2}$ =48
so x= $\sqrt{\frac{48}{5}}$ or x=- $\sqrt{\frac{48}{5}}$
and $y^{2}$ =24- $\frac{48}{5}$
then y= $\sqrt{\frac{72}{5}}$ or - $\sqrt{\frac{48}{5}}$

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3 years ago

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Step-by-step explanation:

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2 years ago

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Georgia [21]

Answer:

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3 years ago

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liq [111]

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Step-by-step explanation:

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2 years ago

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