1.) Which of the ordered pairs
(0, 0), (–2, 10), (–1, –5), (–3, 9)
are solutions for the equation y = 5x?
2.) Which of the ordered pairs
(3, 1), (0, –4), (–4, 0), (–3, –7)
are solutions for the equation x – y = 4?
2007-11-28 12:56:50 · 5 answers · asked by Sara R 1 in Science & Mathematics ➔ Mathematics
Plug them in
(0, 0): 0=5(0) YES
(–2, 10): 10=5(-2) NO
(–1, –5): -5=5(-1) YES
(–3, 9): 9=5(-3) NO
(3, 1): 3-1=4 NO
(0, –4): 0--4=4 YES
(–4, 0): -4-0=4 NO
(–3, –7): -3--7=4 YES
2007-11-28 13:00:44 · answer #1 · answered by RickSus R 5 · 1⤊ 0⤋
Plug in all of the pairs:
1)
0=5(0) TRUE
10=5(-2) FALSE
-5=5(-1) TRUE
9=5(-3) FALSE
2)
3-1=4 FALSE
0--4=4 TRUE
-4-0=4 FALSE
-3--7=4 TRUE
2007-11-28 21:01:15 · answer #2 · answered by someone2841 3 · 0⤊ 0⤋
Substitute each x value into the equation and see if the output y value corrosponds to the y value of the ordered pair.
So for the first one, start with (0,0).
Put x=0 into the equation:
y = 5(0) = 0
Since 0 matches with the given y value of the ordered pair, it must be a solution. Now what about (-2,10)?
Start by putting x=-2 into it:
y = 5(-2) = -10
Since -10 is not the same as 10 (from the ordered pair), it is not a solution.
2007-11-28 21:00:41 · answer #3 · answered by Dan A 6 · 0⤊ 0⤋
the first number in the ordered pair is X the second is Y
(X,Y) then you just plug it in to yhe equation and if it ends up equal you are done and it is a solution but if it isn't equal then it is not solution
1.) (0,0) & (-1,-5)
2.) (0,-4) & (-3,-7)
2007-11-28 21:09:27 · answer #4 · answered by answers that count 1 · 0⤊ 0⤋
0,0 -1,-5
0,-4 -3,-7
2007-11-28 20:59:51 · answer #5 · answered by HI!!!!!! 3 · 0⤊ 0⤋