Algebra 2
posted by Ray
would some one please check these for me
1. divide x^236y^2 over 5x^2+30y divide (x^26xy)
A: x+6y over (5x)(x^2+6y)
2. Add. Express your answer in simplest form.
2x 0ver x^2+15x+54 + 4over x+6
A: 6 over x+9
3. solve: (9 over x5) 1= 8 over x+5
A: 10 and 11
This one I am having problems with a lot
4. Simplify 6/8 over 2/18
this is what I did would you please see if I did this right
6/8
over
2/18
6/8
over
1/9
9*6/8
9+3/4
9*4/4+3/4
36/4+3/4
39/4
5. Subtract 7 over y3 1 over y+1
A: is 2(3y+5) over (y3)(y+1)
6. What values for x must be excluded in the following fraction?
x+2 over x^29x+14
A: 2 and 7
7. Solve. x over 3  x over 4 =4
A: x=48
8.Solve. 7 over x9 + 4 = 3 over x9
A: 8 and 9
9.solve x+1 over 18 = 1 over 3
A: 5
10.If onehalf a number is subtracted from fivesixths of the number, the difference is 6. Find the number.
A: 5/6n  1/2n=6
n= 18
I checked just this one since you were having so much trouble with it. See below.
4. Simplify 6/8 over 2/18
this is what I did would you please see if I did this right
6/8
over
2/18
6/8
over
1/9
9*6/8 OK to here
9+3/4 You changed the * sign to + sign. Should be 9*3/4 = 27/4
9*4/4+3/4
36/4+3/4
39/4
I would have done it this way.
(6/8)/(2/18) =
(6/8)*(18/2) =
(3/4)*(9) = 27/4
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