81x^2-72x+16 is a perfect square trinomial. TRUE OR FALSE ?

Mathematics

1 answer:

dangina [55]2 years ago

6 0

True true true........

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Two cities are 210 km apart. A train traveled this distance in 4 2/3 hours and then made the return trip at a speed of 50 2/5 km

AveGali [126]

$4 \frac{2}{3}= \frac{14}{3}$

So, $\frac{210km}{ \frac{14}{3}hr }= 45km/h$

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So, $\frac{252}{5}/45= 1.12$ times greater on the return trip.

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3 years ago