Which expression is equivalent to: n + 2n - 0.28n A. 3n - 1.28

B. 2.72n

C. 3.28n

D. 2.6n - 1

PLEASE HELPP

N+2n-0.28n
First you can add n+2n=3n then subtract 0.28n from 3n and you will get 2.72n
The answer is 2.72n

One shot. if 60% of 10 is 6, then what is 70%? we know it would be seven (since 60% is mathematically 60/100, or 6/10, then 70% is 70/100, or 7/10) but we can check anyway using ratios: 6 : 60% = x : 70%*inverse multiplicationx * 60% = 6 * 70%*divide both sides by 60%x = (6 * 70%) / 60%x = 7and since he has made 6 shots already, he would need just one more to get 7 shots or 70%. if the explanation is too confusing, comment and i will try to