Algebra

Find the solutions to the system.
y=x^2+5x+6
y=4x+12

A. (2,20) and (-3,0)
B. (2,20) and (-3,-18)
C. (-2,-20) and (-3,-18)
D. no solutions

Find the solutions to the system.
y=x^2-3x-1
y=8x-1

A. (0,-1) and (11,388)
B. (0,-1) and (11,87)
C. (-1,0) and (87,11)
D. no solutions

Hi I'm just very very confused here! I've tried and I just can't figure it out.

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  1. Hello I just figured them out! the first one is B and the second is A!

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  2. What have you done?
    Did you set the y of one equation equal to the y of the other?
    For the 2nd that is, x^2-3x-1 = 8x-1
    x^2 - 11x = 0
    did you factor this to x(x-11) = 0 ???
    Now the answers are obvious

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  3. both are incorrect
    Sub in your choices into the easy second equations, does not work!

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  4. what are the answers

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  5. 9
    A. (2,20) and (-3,0)
    10
    b. (0, -1) and (11, 87)

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