Question 65271: -6x + y = -1 (1,7)
Found 2 solutions by funmath, Edwin McCravy:
Answer by funmath(2933)   (Show Source):
You can put this solution on YOUR website! -6x + y = -1 (1,7)
I assume that you are being asked if (1,7) is a point on the line. To do that, remember that the coordinates are (x,y)=(1,7). Substitute 1 in for x and 7 in for y and see if the equations's sides are equal. If they are it is, if not it's not.
-6(1)+7=-1
-6+7=-1
1=-1 Not true.
(1,7) is not on the line -6x+y=-1.
Happy Calculating!!!
Answer by Edwin McCravy(20055)  (Show Source):
You can put this solution on YOUR website! -6x + y = -1 (1,7)
You didn't give any instructions,
but I'm guessing you were probably
asked something like this:
Answer yes or no as to whether the
ordered pair given on the right is a
solution to the equation given on the
left:
-6x + y = -1 (1,7)
To do this we substitute the first
coordinate of (1,7), which is 1, for
x and the second coordinate or (1,7),
which is 7, for y into the equation:
-6(1) + (7) = -1
Then we simplify
-6 + 7 = -1
1 = -1
This is false so therefore the
answer is no, the ordered pair (1,7)
is not a solution to the equation
-6x + y = -1
-------------------------------------
Suppose you were given this instead:
-6x + y = -1 (-1,-7)
To do thus we substitute the first
coordinate of (-1,-7), which is -1, for
x and the second coordinate or (-1,-7),
which is -7, for y into the equation:
-6(-1) + (-7) = -1
Then we simplify
6 - 7 = -1
-1 = -1
This is true so therefore the
answer is yes, the ordered pair (-1,-7)
is a solution to the equation
-6x + y = -1
---------------------------------------
Suppose you were given:
-6x + y = 1 (1,7)
To do this we substitute the first
coordinate of (1,7), which is 1, for
x and the second coordinate or (1,7),
which is 7, for y into the equation:
-6(1) + (7) = 1
Then we simplify
-6 + 7 = 1
1 = 1
This is true so therefore the
answer is yes, the ordered pair
(1,7) is a solution to the equation
-6x+y = 1
--------------------------
Suppose you were given:
3x - 2y = 16 (-2,5)
To do this we substitute the first
coordinate of (-2,5), which is -2,
for x and the second coordinate or
(-2,5), which is 5, for y into the
equation:
3(-2) - 2(5) = 16
Then we simplify
-6 - 10 = 16
-16 = 16
This is false so therefore the
answer is no, the ordered pair
(-2,5) is not a solution to the
equation 3x - 2y = 16.
-----------------------
Edwin
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