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3 years ago

Hey guys I need help with this question. Solve the system by substitution: x=-1 and 4x+2y=16

Mathematics

2 answers:

amm18123 years ago

3 0

4(-1) + 2y = 16
-4 + 2y = 16
2y = 20
y = 10

I think this is how u do it..

Ludmilka [50]3 years ago

3 0

4x + 2y = 16
4(-1) + 2y = 16
-4 + 2y = 16
+4 +4
2y = 20
/2 /2
y = 10

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3 years ago

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3 years ago

12x+7<-11 or 5x-8>40

DaniilM [7]

Answer:

Step-by-step explanation:

Given

12x + 7 < - 11 or 5x - 8 > 40

Solve each inequality

12x + 7 < - 11 ( subtract 7 from both sides )

12x < - 18 ( divide both sides by 12 )

x < - $\frac{3}{2}$

5x - 8 > 40 ( add 8 to both sides )

5x > 48 ( divide both sides by 5 )

x > $\frac{48}{5}$

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