Respuesta :
We want to find and solve a system of equations to see how much spent each one of the 3 friends.
We can conclude that Dasher spent $120, Prancer spent $240, and Cupid spent $360.
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To make the system of equations, first we need to define the variables that we will use.
- D = amount that Dasher spent.
- P = amount that Prancer spent.
- C = amount that Cupid spent.
We know that:
"Dasher spent half as much as Prancer".
- Then: D = P/2.
"Cupid spent 3 times more than Dasher"
- Then: C = 3*D
"In total the spent $720"
- Then: C + D + P = $720
Writing the 3 equations together, we get:
- D = P/2
- C = 3*D
- C + D + P = $720
To solve the system we need to replace variables, we can see that C is isolated in the second equation, then we can replace it on the last one so we get:
D = P/2
3*D + D + P = $720
Now we can replace the first one in the second one to get:
3*(P/2) + P/2 + P = $720
3*P = $720
P = $720/3 = $240
Then we can use the first equation to find the value of D:
D = P/2 = $240/2 = $120
Finally, we can use the second equation find the value of C:
C = 3*D = 3*$120 = $360
Then we can conclude that Dasher spent $120, Prancer spent $240, and Cupid spent $360.
If you want to learn more, you can read:
https://brainly.com/question/12895249