1 hour = 450 calories
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Rewrite 1 hour as 60 mins :
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60 mins = 450 calories
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Divide by 3 through :
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20 mins = 450 ÷ 3
20 mins = 150 calories
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Answer: 20 mins burns 150 calories.
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Hello,
2x²+x-14=0
Δ=1+4*14*2=113
x=(-1-√113)/4=-2,8839...≈-2.88
or x=(-1+√113)/4=2,40753≈2.41
