Question

Michiko had 3 liters of oil. She used 3/7 of it. How many did she have left? (with working)

Answer 1

Answer:

18/7

Step-by-step explanation:

oil has used = 3/7 l

total oil = 3l

remaining oil = 3- 3/7 = 18/7

Answer 2

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x²-2x-5=0

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$x = \frac{ - b± \sqrt{ {b}^{2} - 4ac} }{2a}$

$x = + \sqrt{24} \: or \: x = - \sqrt{24}$

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