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ob3ymysins
14.09.2019 •
Mathematics
Explain reasoning!
1.) if you make 20% more money than me, then i make 20% less than you.
2.)if i have an average of 60% before the final , then i must score 80% on the final in order to raise my average up to 70% to pass the this math 75 class.
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Ответ:
1.) Incorrect,
2.) Correct
Step-by-step explanation:
1.) Let x be the amount of money,
After increasing x by 20%,
New amount of money ( say y )= (100+20)% of x ( i.e. y is 20% more than x )
= 120 % of x
⇒ y = 1.20x
≈ 16.67%
Thus, x is approximately 16.67% less than y.
2.) First score = 60%,
Second score = x% ( let )
So, Average percentage score =![\frac{60+x}{2}](/tpl/images/0231/2797/ad364.png)
If![\frac{60+x}{2}=70](/tpl/images/0231/2797/4ce59.png)
Ответ:
answer:
it is d
step-by-step explanation: