2007-03-11 09:52:10 · 4 answers · asked by White Trash 2 in Science & Mathematics ➔ Mathematics
x=44
2007-03-11 09:53:09 · answer #1 · answered by Anonymous · 0⤊ 0⤋
i'm going out on a limb here and guess that you mean at x = 5, y = 7 and at x = 7, y = 9 then what is relationship between x and y?
you have two data points (5,7) and (7, 9)
since you have only two points, I can relate the two with a line in the form y = mx + b
so plugging in values for x and y from the two points...
7 = m*5 + b = 5m+b ----> b = 7-5m
9 = 7m + b
substituting the first into the second...
9 = 7m + (7 - 5m)
2 = 2m
m = 1
so that y = x + b
and plugging in either point gives say...
7 = 5 + b
b = 2
so y = x + 2
2007-03-11 17:00:54 · answer #2 · answered by Dr W 7 · 0⤊ 0⤋
x =44
2007-03-11 17:00:50 · answer #3 · answered by hbj 2 · 0⤊ 0⤋
i dont think that the answer is not 42 but i might be incorrect , i think that you divided away the x , is that right ?
Did you divide away an X ?
without checking the X not being 0 ? tsk tsk tsk ....
5x = 7x => 5 = 7 .....
5x = 7x => 5x - 7x = 0 => -2x = 0 thus x = 0 is a solution.
2007-03-11 17:30:35 · answer #4 · answered by gjmb1960 7 · 0⤊ 0⤋