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# 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-81 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. Thanks1 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? Thanks1 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