Question

Solve the system of equations by substitution.
x + y = 10

y = 9x


(Simplify your answer. Type an ordered​ pair.)
Answer
Solve the system using substitution. Check your answer.

y = -6x + 30

5y - x + 5 = 0
Answer
Solve by the substitution method.

3x + 5y = -1

-5x + y = 39
Answer
Solve the system using substitution. Check your answer.


9x - 3y = 1

3y = x - 1

​(Simplify your answer. Type an ordered​ pair.)
Answer
Sarah took the advertising department from her company on a round trip to meet with a potential client. Including Sarah a total of 11 people took the trip. She was able to purchase coach tickets for ​$220 and first class tickets for ​$1030. She used her total budget for airfare for the​ trip, which was ​$6470. How many first class tickets did she​ buy? How many coach tickets did she​ buy?
Answer
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