New! Get regular updates about newly solved problems via algebra.com's RSS system.

Recent problems solved by 'kennyxx12'

kennyxx12 answered: 3 problems

Linear-systems/557195: Solve the linear system by using substitution method in -5x+3y=51 and y=10x-8
1 solutions

Answer 362606 by kennyxx12(3) on 2012-01-15 10:06:33 (Show Source):

You can put this solution on YOUR website!
ok one is already isolated for y
y=10x-8
substitude it y=10x-8 this equals to y
now plug it in
-5x+3y=51(original formulae)
-5x+3(10x-8)=51(after substitution)
-5x+30x-24=51
25x-24=51
ADD 24 TO BOTH SIDES
25X=75
DIVIDE
X=3
NOW SUBSTITUTE X ON THE OTHER FORMULAE
Y=10(3)-8
Y=30-8
Y=22
X=3
ANSWER (3,22)

Linear-systems/67614: Solve the system by system:
8x - 4y = 16
y = 2y - 4
This substitutions have gotten me confused, any help would be appreciated. Thanks
1 solutions

Answer 362605 by kennyxx12(3) on 2012-01-15 09:57:14 (Show Source):

You can put this solution on YOUR website!
first look at the problem closely y=2y-4
since y equals 2y. minus 4 then y has to be 4
since y+y-4=y
y=4
now enter y to the other equation if substituted to the same formula infinite many solutions will be the answer.this is wrong for this question
8x-4y=16
8x-(4*4)=16
8x-16=16
take the minus 16 to the other side to isolate 8x
and negate the signs to it
8x=16+16
8x=32
divide both sides to isolate x
x=4

THE ANSWER IS=(4,4)

Linear-systems/66638: This question is from textbook Beginning Algebra
Find the slope of the line passing through the points (2, 2) and (4, 2).
a)0
b)1
c)2
d)Undefined
When working this problem I came up with b)as the answer for this question. Is this correct? If not could you help me with this? Thanks
1 solutions

Answer 362604 by kennyxx12(3) on 2012-01-15 09:48:58 (Show Source):

You can put this solution on YOUR website!
use delta y over delta x. or rise over run.the diffrence of the y axis over the diffrece of the x axis.the slope is
rise=2
run=0
the slope is 2/0
the slope is undefined

See tutors' answers!

Recent problems solved by 'kennyxx12'