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Dovator [93]
2 years ago
10

The equations below represent the numbers y of tickets sold after x weeks for two different local music festivals

Mathematics
2 answers:
Anton [14]2 years ago
5 0
Assuming you mean y=10x+150 and y=20x+115, you need to use a simultaneous equation, because you have two equations with two unknowns (x and y)

rearrange so
10x-y=-150
20x-y=-115

multiply the top by -1, so that if we add the two lines together, the y will cancel out
-10x+y=150
20x-y=-115

add the two lines together
10x=35
x=3.5

so the time is 3 and a half weeks

then we can sub in x to find y
20x-y=-115
20(3.5)-y=-115
70-y=-115
-y=-185
y=185

so 185 tickets were sold !
you can sub these values into your original equations to check your answer :)
sleet_krkn [62]2 years ago
5 0

Answer:

185 tickets is the answer. Hope this helped :)

Step-by-step explanation:

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