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Ugo [173]
3 years ago
15

Solve the system by the substitution method x+3y=-2, y=-2x-24

Mathematics
1 answer:
n200080 [17]3 years ago
4 0
X + 3(-2x - 24) = -2
x - 6x - 72 = -2
-5x - 72 = -2
+ 72
-5x = 70
÷ -5
x = -14
Let me know if you have any questions!
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Answer:

The number of different possible values are {-7,-6,-5,-4,-3,-2,-1,0,1,2,3,4,5,6,7}.

Step-by-step explanation:

Given : For an integer n, the inequality  \[x^2 + nx + 15 < 0\]  has no real solutions in x.

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The given inequality is   \[x^2 + nx + 15 < 0\] have no solution then the discriminant must be less than zero.

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{n}^{2}  - 4 \times 1 \times 15  \: <  \: 0

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i.e. - 7.75 \:  <  \: n \:  <  \: 7.75

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