Find the values for m and b in the following system so that the solution to the system is (1,2)
mx+3y=8
-3x+4y=b
2006-10-25 15:05:37 · 7 answers · asked by lailani l 1 in Science & Mathematics ➔ Mathematics
substitute (1,2) for x,y in the problems. that should do the trick
2006-10-25 15:08:10 · answer #1 · answered by Syd 5 · 1⤊ 0⤋
Substitute 1 for x and 2 for y: Looks like this:
x=1, y=2
m(1) + 3(2) = 8 >> m + 6 = 8 >> m = 2
-3(1) + 4(2) = b >> -3 + 8 = b >> b = 5
2006-10-25 22:16:18 · answer #2 · answered by Anonymous · 0⤊ 0⤋
First plug in x=1 and and y=2 for each equation:
m(1) + 3(2) = 8
and
-3(1) + 4(2) = b
Then solve for m by reagranging the problem:
m(1) + 3(2) = 8
m + 6 = 8
m = 8 - 6
m =2
-3(1) + 4(2) = b
-3 +8 = b
8 - 3 = b
5 = b
does that make sence?
best of luck!
2006-10-25 22:16:43 · answer #3 · answered by Sarah 4 · 0⤊ 0⤋
holy cow i need help with that to sorry that i cant help mabey einstein could help you LOL
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2006-10-25 22:36:18 · answer #4 · answered by hey_hey_hey 3 · 0⤊ 0⤋
im 36 years old and I need help with your homework. good luck.
2006-10-25 22:09:36 · answer #5 · answered by eric s 2 · 1⤊ 0⤋
Syd's hint should help you solve this problem
2006-10-25 22:17:04 · answer #6 · answered by shamu 2 · 0⤊ 0⤋
b=5
m=2
hope this helps
2006-10-25 22:18:20 · answer #7 · answered by hooman m 2 · 0⤊ 0⤋