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. how much money did he start with?

The gambler came with $31.

Step-by-step explanation:

Let x be the initial amount.

At the end of the first race at the track he had doubled his money, that is 2x.

He bet $31 on the second race and tripled the money he came with.

Means 3x.

He bet $51 on the third race and quadrupled his original bankroll that is 4x.

He bet $84 on the fourth race and lost it, but still had $40 left.

Summing all the values, we get;

=>

=>

=> x = 31

Hence, the gambler came with $31.

true

explanation:

look at the picture.

y-intercept for the function on a picture is 4 → point (0, 4).

y-intercept for the function

is for x = 0. substitute:

y-intercept is 8 → point (0, 8).