Thirty years ago, Bruce Wayne bought a Batmobile for 729 million dollars. As the crime in Gotham City has been down for a while, he plans to sell it. How much can he get for the Batmobile today if the price goes down by 331/3% every 5 year.

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

1. minimum

2. 6400

3. eight

hope this !

the answer is c.

step-by-step explanation: