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# Recent problems solved by '3788'

3788 answered: 5 problems
 Systems-of-equations/226682: I need help with figuring out how to do a problem like this: Solve the following systems of equations using any method. Check each solution, if possible: a. -2x+3y=1 2x+6y=2 solution: Solve the second equation for x (you could solve for y - it doesn't matter). 2x + 6 y = 2 becomes x = -3y +1 Now, substitute -3y +1 for x in the first equation. This gives the equation -2(-3y +1)+3y = 1 6y -2 +3y =1 9y -2 =1 9y= 3 y=3/9 or y = 1/3 Now, substitute 1/3 for y in either equation and solve for x. (We use the second equation below.) 2x + 6(1/3) = 2 2x + 2 = 2 2x = 2- 2 2x =0 , x = 0 The solution is the ordered pair, (0, 1/3). now you can check where you see x just replace with 0 , and where see y just replace it with (1/3).. good luck 1 solutions Answer 168746 by 3788(5)   on 2009-10-14 18:30:25 (Show Source):
 Functions/226660: what is 3x^2 = 10x let us solve for x : 3x^2 -10x = 0 x(3x-10) x = 0 or 3x-10=0 solve for x : 3x= 10 x = 10/3 1 solutions Answer 168739 by 3788(5)   on 2009-10-14 18:03:14 (Show Source):
 Linear-equations/226647: what is the slope and y intercept of the graph of 5x-2y=30? you need to write this in terms of y : 5x-2y = 30 bringing 5x to the other side becomes -2y = 30 - 5x dividing by -2 becomes y = 30/-2 -5x/-2 arrage it becomes y = 5x/2 -15 looking at the equestion we can find the slope and y intercept slope = 5x/2 , y-int = -15 good luck1 solutions Answer 168734 by 3788(5)   on 2009-10-14 17:40:26 (Show Source):
 Linear-equations/226593: i need your help on writing (y-5=1/3(x-6) y-5 = 1/3x - 2 bring the -5 to the other side becomes y= 1/3x-2+5 ---> y = 1/3x + 3 1 solutions Answer 168724 by 3788(5)   on 2009-10-14 17:23:01 (Show Source): You can put this solution on YOUR website!simplify_cartoon( y-5= 1/3(x-6) )
 Problems-with-consecutive-odd-even-integers/226612: If the sum of two numbers is 19 and their product is 90, what is the sum of their squares? sum of two number is 9 + 10 = 19 product is 9 x 10 = 90 9^2 + 10^2 = 1811 solutions Answer 168714 by 3788(5)   on 2009-10-14 17:00:47 (Show Source):