Given the linear equation 3y + 4x =12, find the y-intercept.
A.
4
B.
09_01_ST_12_aa.gif
C.
–4
D.
09_01_ST_12_ac.gif
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OpenStudy (anonymous):
B. -4/3
D. 4/3
@zeinas.
OpenStudy (anonymous):
@wolf1728
OpenStudy (anonymous):
Hi. My computer timed out. So first, we need to subtract 4x from both sides:
3y+4x-4x=-4x+12.
Cancel out the the both 4x on the left side. What do you get?
OpenStudy (haseeb96):
y=mx+b
for y inter cept put x=0
3y=-4x+12
3y=12
y=4
OpenStudy (haseeb96):
A.4 is the correct answer
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OpenStudy (anonymous):
3y=-4x+12
y=-4/3x+4
so the y intercept is b in y=mx+b
so its 4
OpenStudy (anonymous):
ok thanks just one more question and I would be forever gratefull!!!!
OpenStudy (anonymous):
Solve for x.
09_01_ST_14_b.gif
A.
x = 2
B.
x = 41
C.
x = 6
D.
x = 43
OpenStudy (anonymous):
Sure. Are you going to post it here or tag me in?
OpenStudy (anonymous):
x-1/12=7/2
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OpenStudy (anonymous):
@zeinas.
OpenStudy (anonymous):
@Haseeb96
OpenStudy (anonymous):
You are the best teacher ever!!! I hope you know how thankful I am!!!! @zeinas.
OpenStudy (anonymous):
Thanks.:) So to solve that we need to add 1/12 to both sides of the equation.
so it will be x+1/12-1/12=7/2 +1/12
What will we have when 1/12 cancel from the left side?
OpenStudy (anonymous):
x=7/2+1/2?
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OpenStudy (anonymous):
x=7/2+1/2
OpenStudy (anonymous):
I think its 6?
OpenStudy (anonymous):
That will be right. But I do have a question. Was your question x-1/12=7/2 or x-1/2=7/2?