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jasenka [17]
4 years ago
6

Solve the system using elimination and describe your steps. Be sure to verify your solution. • x = y - 3 2x + y = 12

Mathematics
1 answer:
hram777 [196]4 years ago
6 0

So these are our two equations: 2x+y=12\\x=y-3

Before we can use elimination, subtract y on both sides of the first equation: 2x=-y+12\\x=y-3

Now we are able to use elimination. To eliminate the y variable, add the two equations together to get 3x=9 . From here we can solve for x.

For this, just divide both sides by 3 and your first answer will be x=3

Now that we have the value of x, substitute it into either equation to solve for y:

2*3+y=12\\6+y=12\\y=6\\\\3=y-3\\6=y

<u>In short, x = 3 and y = 6.</u>

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The total distance Allie traveled was 0.81 miles.

Step-by-step explanation:

Since Allie rode her bike up a hill at an average speed of 12 feet / second, and she then rode back down the hill at an average speed of 60 feet / second, and the entire trip took her 2 minutes, to determine what is the total distance she traveled, the following calculation must be performed:

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If she returns the skis at 3 p.m. she would pay $25. IM NOT SURE ABOUT 3:05 PM

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