5m divided by m+1
plus
1+4m divided by m+1
=
m-1 over m+1
.................................................
a+b divided by 2
plus
a-b divided by 2
=
b
....................................................
x squared divided by x+5
minus
5x divided by x+5
=
x
......................................................
Can someone please show me how you get to these answers? I know how to do this, but for some reason I'm doing something wrong because I CANNOT get to these answers!!
2007-02-17 01:23:44 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Equation No. 1: The plus between the fractions should be a minus.
Equation No. 2: The plus between the fractions should again be a minus.
Equation No. 3: The minus between the fractions should be a plus!
The signs are wrong if you are to get to the answers you need.
2007-02-17 01:33:40 · answer #1 · answered by Tenebra98 3 · 1⤊ 0⤋
Is this what you are after?
5m/(m+1)+(1+4m)/(m+1)=(m-1)/(m+1)
multiply both sides by (m+1) and get:
5m + (1+4m) = m-1
9m +1=m-1
8m=-2
m=-1/4
(a+b)/2 + (a-b)/2 = b
multiply both sides by 2 and get:
a+b + a-b = 2b
2a = 2b
a = b
x^2/(x+5) - 5x/(x+5) = x
multiply both sides by (x=5) to get:
x^2 -5x = x(x+5)
x^2 - 5x = x^2 + 5x
-5x = 5x
x = -x x therefore must be zero
2007-02-17 01:49:43 · answer #2 · answered by ? 1 · 1⤊ 0⤋
A)
5m 1+4m -1(1+4m) -4m+5m-1 1+m m-1
-------- + -------- = ------------= ------------ = ------- = -------
m+1 m+1 m+1 m+1 m+1 m+1
On the second the top number of the second faction you flip the top number by mulitpe by negative one to get -4m-1 then you add 5m to it.
2007-02-17 03:13:02 · answer #3 · answered by Tyler M 2 · 1⤊ 0⤋
5m/m+1+1+4m/m+1=m-1/m+1
Multiply both sides by m+l:
5m+1+4m=m-1
9m+1=m-1
Subtract m from both sides:
8m+1=-1
Subtract 1 from both sides:
8m=-2
Divide 8 from both sides:
m=-1/4
Check:
5(-1/4)/(-1/4+1)+(1+4(-1/4)/
(-1/4+1)=(-1/4-1)/(-1/4+1)
-5/4/3/4+0/3/4=-5/4/3/4
-5/4*4/3=-5/4*4/3
-5/3=-5/3
2)(a+b)/2+(a-b)/2=b
Multiply both sides by 2:
(a+b)+(a-b)=2b
a+b+a-b=2b
2a=2b
Divide both sides by 2:
a=b
Check:
(b+b)/2+(b-b)/2=b
2b/2+0/2=b
b=b
3)x^2/x+5-5x/x+5=x
Multiply both sides by x+5:
x^2-5x=x(x+5)
x^2-5x=x^2+5x
Subtract x^2 from both sides:
-5x=5x
Add 5x from both sides:
10x=0
Divide 10 from both sides:
x=0
Check:
(0)^2/(0+5)-5(0)/(0+5)=0
0/5+0/5=0
0=0
I hope this helps!
2007-02-17 01:56:11 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Question 1: m=-0.25
Question 2: any number so that a=b
Question 3: x=0
2007-02-17 03:13:06 · answer #5 · answered by Anonymous · 1⤊ 0⤋
(5m/m+1)+(1+4m/m+1)= m-1/m+1
m+1[(5m/m+1)+(1+4m/m+1)= m-1/m+1]m+1
5m+1+4m=m-1
5m+4m-m=-1-1
8m= -2
m= -2/8
m= -1/4
===============================
(a+b/2)+(a-b/2)=b
2[(a+b/2)+(a-b/2)=b]2
a+b+a-b=2b
2a+2b=2b
2a=2b-2b
2a=0
a=0
(o+b/2)+(0-b/2)=b
b=0
================================
(x^2/x+5)-(5x/x+5)=x
x+5[(x^2/x+5)-(5x/x+5)=x]x+5
x^2-5x=x^2+5x
x^2-x^2=5x+5x
x=0
2007-02-17 02:41:54 · answer #6 · answered by je_ivy_an 2 · 1⤊ 0⤋
some presentation ----a artwork of artwork ! 2y / [ ( y - 7 ) ( y - 7 ) ] - one million / [ 2 ( y - 7 ) ( y + 7 ) ] + one million / [ 4 ( y - 7 ) ] 8y - 2 + y + 7 ------------------------- 4 ( y - 7 ) ( y + 7 ) 9y + 5 ------------------------ 4 ( y - 7 ) ( y + 7 )
2016-10-15 12:28:22 · answer #7 · answered by rosen 4 · 0⤊ 0⤋
I don't know where you got the answers, but I don't get them either.
2007-02-17 02:07:48 · answer #8 · answered by Jack 2 · 1⤊ 0⤋