Aprofessional gambler reported that at the end of the first race at the track he had doubled his money. he bet $31 on the second race and tripled the money he came with. he bet $51 on the third race and quadrupled his original bankroll. he bet $84 on the fourth race and lost it, but still had $40 left. with how much money did he start?

step-by-step explanation:

the multiplicative inverse of a fraction a/b is b/a. for the multiplicative inverse of a real number, divide 1 by the number. for example, the reciprocal of 5 is one fifth 1/5 or 0.2, and the reciprocal of 0.25 is 1 divided by 0.25, or 4.

d 600 because 15*10*2=300

300+300=600

step-by-step explanation:

put greater than symbol. (> ). can i get brainliest?