after riding the stationary bike for just 8 minutes, betty had burned 50 calories. how long must she ride if she wants to burn 3
1 answer:
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Answer:
3/20, -3/10
Step-by-step explanation:
Its a quadratic equation, use the quadratic formula. (-b+-)/2a
20x^2+3x-2=0
(-3+-)/40
(-3+-9)/40
So you get 6/40=3/20 and -12/40=-3/10