12) The school that Danielle goes to is selling tickets to a choral performance. On the first day of
1 answer:
Answer:
Senior citizen tickets = $9
Student tickets = $11
Step-by-step explanation:
We begin by converting these into simultaneous linear equation;
Senior citizen tickets = a
Student tickets = b
5a + 9b = 144
14a + 6b = 192
5a = 144 - 9b
a = 144/5 - 9b/5
a = 28.8 - 1.8b
We now substitute this into the first equation
14(28.8 - 1.8b) + 6b = 192
403.2 - 25.2b +6b = 192
-19.2b = 192 - 403.2
b = -211.2/-19.2
b = 11
Put the value of b into either equation
5a + 9b = 144
5a + 9(11) = 144
5a +99 = 144
5a = 144-99
5a = 45
a = 9
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Answer:
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9+(-7)
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Step-by-step explanation:
Answer:
the answer should be -1
Step-by-step explanation:
-3 + (-2) + (-4) = -9
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Hope this helped :)
The answer would be -5a+3b
3a+(-8a)=-5a
2b+b=3b