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Roman55 [17]
3 years ago
10

Solve the following system of equations using the substitution method.

Mathematics
1 answer:
eduard3 years ago
7 0
The correct answer would be D, (3,-4). For the first equation, x=2y+11 would be 3=2(-4)+11 which turns to 3=-8+11 which equals 3=3 so it’s true. For the second equation, 7x+2y=13 which becomes 7(3)+2(-4)=13 making it 21-8=13 which turns into 13=13 so this is true as well.
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Answer:

The solutions are -0.65 and 4.65.

Step-by-step explanation:

3x^2 - 12x = 9

Divide both sides by 3

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To make a square with "x^2 - 4x", you need to have a "+ 4" after it so it can be simplified as (x-2)^2.  So add 4 to both sides.

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