Answer:
y = 3x - 2
Step-by-step explanation:
<em>use y = mx + b</em>
y = -2
x = 0
m (slope) = 3
b (y-intercept) = -2, <em><u>since the point (0,-2) passes through the y a</u></em>xis.
<em>put is as slope-intercept form:</em>
y = 3x - 2
Hmm
what you do is try to eliminate 1 variable in 2 equaions first
we can elminate x's in first and 2nd equation
add first and 2nd equation
x+3y-2z=10
<u>-x-2y+z=-7 +</u>
0x+y-z=3
y-z=3
multiply 2nd equation by 3 and add to last one
-3x-6y+3z=-21
<u>3x+9y-5z=28 +</u>
0x+3y-2z=7
3y-2z=7
we now have
y-z=3
3y-2z=7
multiply first equation by -2 and add to 2nd
-2y+2z=-6
<u>3y-2z=7 +</u>
y+0z=1
y=1
now we can sub back
y-z=3
1-z=3
minus 1
-z=2
times -1
z=-2
sub baack into any equation
x+3(1)-2(-2)=10
x+3+4=10
x+7=10
minus 7
x=3
x=3
y=1
z=-2
(3,1,-2)
Answer:
X=6.1
Step-by-step explanation:
x-5=0.1(x+5)
x-5=0.1x+0.5 (distribute 0.1)
x=0.1x+0.5+5 (add 5 to each side)
x-0.1x=5.5 (subtract 0.1x from each side)
0.9x=5.5 (combine like terms)
x=5.5/0.9 (divide by 0.9 on both sides)
x=6.1 (simplify)
That is a ratio. If you mean the simplified version, then 2:7
Answer:
Step-by-step explanation:
I think you are trying to use synthetic division for
divided by x-3
First
x -3 = 0 , make it equal to 0 and add 3 to both sides
x = 3
Then we write all the coefficients and continue with
a pattern of multiply by 3 and add to the next coefficient.
See attachment.