2 years ago

HELP ASAP!! WILL GIVE BRAIN THING AND A THANKS!

Mathematics

1 answer:

WINSTONCH [101]2 years ago

7 0

Answer:

Step-by-step explanation:

that is the answer i got

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Step-by-step explanation:

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According to question, we get that

$\dfrac{230}{x}-\dfrac{230}{x+8}=\dfrac{3}{2}\\\\230\dfrac{x+8-x}{x(x+8)}=\dfrac{3}{2}\\\\\dfrac{230\times 8}{x^2+8x}=\dfrac{3}{2}\\\\\dfrac{1840}{x^2+8x}=\dfrac{3}{2}\\\\1840\times 2=3x^2+24x\\\\3680=3x^2+24x\\\\3x^2+24x-3680=0\\\\x\approx 56.8\ km/hr$

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