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Orlov [11]
2 years ago
12

Find an ordered pair (x, y) that is a solution to the equation. 2x-y=9

Mathematics
1 answer:
Shalnov [3]2 years ago
3 0
(0,-9) or (1,-7) or (2,-5) either one would be correct
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Ms. Hamby gave a quiz. Two students' work and the answer key are shown. Ms. Hamby accepts equivalent answers in any form. Part A
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Answer:

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Step-by-step explanation:

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Exponential of 0,7 and 2525
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System of Equations Problem
aksik [14]

Sarah bought 3 first class tickets and 7 coach tickets.

Step-by-step explanation:

Given,

Number of people = 10

Total amount spent on tickets = $4830

Cost of each coach ticket = $270

Cost of each first class ticket = $980

Let,

x be the number of coach tickets

y be the number of first class tickets

According to given statement;

x+y=10      Eqn 1

270x+980y=4830   Eqn 2

Multiplying Eqn 1 by 270

270(x+y=10)\\270x+270y=2700\ \ \ Eqn\ 3\\

Subtracting Eqn 3 from Eqn 2

(270x+980y)-(270x+270y)=4830-2700\\270x+980y-270x-270y=2130\\710y=2130

Dividing both sides by 710

\frac{710y}{710}=\frac{2130}{710}\\y=3

Putting y=3 in Eqn 1

x+3=10\\x=10-3\\x=7

Sarah bought 3 first class tickets and 7 coach tickets.

Keywords: linear equation, elimination method

Learn more about elimination method at:

  • brainly.com/question/96882
  • brainly.com/question/96535

#LearnwithBrainly

5 0
2 years ago
1. Carter bought 3 oxen, 4 cows and 6 calves for $260. He paid twice as much for a cow as for a calf
valentinak56 [21]

Answer:

120 for oxen, 80 for cows, 60 for calves

o = 2x

Step-by-step explanation:

3o + 4x + 6c = 260

x = 2c

o = 2x

6x + 4x + 3x = 260

13x = 260

260 / 13 = 20

3o = 6x = 120

4x = 80

6c = 3x = 60

o = 2x

4 0
2 years ago
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