How many solutions does the system of equations below have? y=x+2 y=x-1 A one B two С none D infinitely

Question

How many solutions does the system of equations below have?
y=x+2
y=x-1
A one
B two
С none
D infinitely many

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Diễm Thu 4 years 2021-08-23T23:16:13+00:00 2 Answers 5 views 0

Answers ( )

  1. trucchi
    0
    2021-08-23T23:17:30+00:00
    Reply

    Answer:

    C:  none

    Step-by-step explanation:

    Here we have two separate functions named ‘y.’  Eliminate ‘y’ temporarily by equating these functions together:

    x + 2 = y = x – 1

    Subtracting x from both sides, we get:

    0 + 2 = y = 0 – 1, or

           2 = -1

    This is never true, so C is the correct answer:  NO solutions.

    An easier way in which to do this problem is to visualize the graphs of

    y = x + 2 and y = x – 1.  The graphs are parallel straight lines; they never intersect, and therefore we can conclude “no solution.”

  2. thucuc
    0
    2021-08-23T23:17:54+00:00
    Reply

    Answer:

    C

    Step-by-step explanation:

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )