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Fittoniya [83]
3 years ago
5

Tina wrote the equations 3x-y=9 and 4x+y=5. What can Tina conclude about the solution to this system of equations?

Mathematics
2 answers:
sergiy2304 [10]3 years ago
5 0
The answer to your question is: C. 2,-3
Hope this helps
TiliK225 [7]3 years ago
4 0
ANSWER IS C
 3x-y=9 eq 1
4x+y=5 eq2 
y=5-4x eq3 from eq 2 
substitute value of y in equation 1
3x-5+4x=9
x=2
put value of x in eq number 3
y= 5-4(2)
y=5-8
y=-3
SO ANSWER IS C THAT IS 2,-3 
x=2 y= -3

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elena55 [62]

Answer:

D: x = 2

Step-by-step explanation:

Go down the multiple choices answers and plug each value in for x until the inequality is true:

A:

1/4(32) < 8

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32/4 < 8

8 < 8

8 is not less than 8 so this is false (8 = 8).

B:

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8 3/4 is not less than 8 so this is false (8 3/4 > 8).

C:

1/4(34) < 8

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8 2/4 is not less than 8 so this is false (8 2/4 > 8).

D:

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6 0
3 years ago
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Musya8 [376]
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How do I know this?
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Subtract 75 from 180:
180 - 75 = 105
105 is our answer.
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3 0
3 years ago
What is the value of the expression |x y| |z| when x = –6, y = 4, and z = –13?
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4 0
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