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Alexxandr [17]
3 years ago
5

Solve the systems of equations using substitution. -3x + 2y = 12 x = 2y - 8

Mathematics
1 answer:
ankoles [38]3 years ago
4 0

-3(2y-8) + 2y = 12

-4y + 24 = 12

-4y = -12

y=3

x=2(3)-8

x=-2

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2 years ago
Graciela was trying to solve the quadratic equation x2+2.5x−1.5=0 "I think I need to use the Quadratic Formula because of the de
drek231 [11]

Answer:

The answer to your question is  x² + 5/2x - 3/2 = 0

Step-by-step explanation:

Data

Quadratic equation           x² + 2.5x - 1.5 = 0

Process

1.- Convert the decimals into fractions

2.5 = 25/10 = 5/2

1.5 = 15/10 = 3/2

2.- Substitution

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3.- Conclusion

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3 years ago
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3 years ago
Complete the solution of the equation. Find the value of y when x equals -15. -x ‒ 8y = -1
valkas [14]
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As so:

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Next, we can subtract 15 from each side to get:

15 - 15 - 8y = -1 - 15
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Now, we can divide by -8 on each side to get the y by itself:

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y = kx
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3* 10 =  3*(1/3)x
30 = x
x = 30
8 0
3 years ago
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