Andy has won 12 out of the last 24 tennis matches he has played. if he wants to improve his win record to 70%, which equation could he use to determine how many matches he would have to win in a row? a) 12 + x 24 + x = 0.70 b) 24 + x 12 + x = 0.70 c) 0.70 24 + x = 12 + x d) 0.70 12 + x = 24 + x

Answer is A

12+x

. =0.70

24+x

answer

the correct answer is

explanation

the given function is

the excluded values are obtained by solving:

we factor to obtain:

the excluded values are

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.