Anthony Tedesco sold his used mountain bike and accessories for $140. If he received 4 times as much money for the bike as he did for the accessories, find how much money he received for the bike. He received $for the bike.

Step-by-step explanation:

Accessories: x

Bike: 4x

Total1: 5x

Total2: 140 dollars.

x + 4x = 140 dollars

5x = 140

x = 28

Accessories: 28

Bike: 112

$112

Step-by-step explanation:

First you must see that there are 2 variables in this problem, the bike and accesories.

If the bike and accesories are equal to $140 then, x+y=140.

If the bike is 4x the amount of the accesories then 4x=y. Substitute y in the first equasion for x+4x=140.

That means 5x=140, and solving for x you get $28. Since the bike was 4x the amount of accesories then 4*28= $112.

To check your work you can solve it again. $28+$112=$140 or 28+4*28=140.

answer: 80,000

step-by-step explanation:

the population doubles every day.

10,000*2=20,000 day 4

20,000*2=40,000 day 5

40,000*2=80,000 day 6