9x+5y=45
What is y when x =1.
This is for graphing by the way..... I thought it'd be 9 but that answer was wrong.
2007-07-05 17:13:04 · 9 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
9 (1) + 5y = 45
9 + 5y =45
5y = 45 - 9
5y = 36
y = 7.2
2007-07-05 17:19:58 · answer #1 · answered by Lady Geologist 7 · 2⤊ 1⤋
y=1
2007-07-05 19:08:05 · answer #2 · answered by Brittany 3 · 0⤊ 2⤋
Hi, ok you need to plug in the answer. so 9 times 1 is 9.
Now it looks like this: 9+5y=45
Subtract the 9 from both sides
Now you are left with 5y=36
Divide 5 from bother sides.
You get Y= 7.2
2007-07-05 17:21:56 · answer #3 · answered by Dogna M 4 · 0⤊ 1⤋
9x + 5y =45
x = 1
substitute 1 in for x in the first eqn and solve for y
9*1 +5y = 45
9 + 5y = 45
5y = 45-9 = 36
y = 36/5 = 7.2
put into the first eqn and verify answer
9*1 + 5*7.2 = 45
9 + 36 = 45
(note, y = 9 when x = 0 then you have
9*0 + 5y = 45
0+5y = 45
5y = 45
y = 45/5 = 9)
2007-07-05 17:21:17 · answer #4 · answered by Navidad_98 2 · 1⤊ 1⤋
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2016-10-01 00:07:49 · answer #5 · answered by ? 4 · 0⤊ 0⤋
y=36/5
2007-07-05 17:19:41 · answer #6 · answered by crazygoug 2 · 0⤊ 2⤋
Well, yeah...7.2
2007-07-05 17:23:42 · answer #7 · answered by James Q 4 · 0⤊ 3⤋
uuuhhhhhhh im not sure
2007-07-05 17:23:25 · answer #8 · answered by Anonymous · 0⤊ 3⤋
7.2
2007-07-05 17:35:14 · answer #9 · answered by Anonymous · 0⤊ 2⤋