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malfutka [58]
3 years ago
14

Could someone do this problemf or me? I'm havnig such a hard time. im horrible when it comes to showing my work.. I need all the

work to be shown
x/x-2 + x-1/x+1 = -1
Mathematics
1 answer:
Daniel [21]3 years ago
3 0
\frac{x}{x-2} + \frac{x-1}{x+1} =1
Least common denominator is (x-2)(x+1)
Multiply this times each term.
(x-2)(x+1)( \frac{x}{x-2} )+(x-2)(x+1)( \frac{x-1}{x+1} )=(x-2)(x+1)(-1)
After cancelling the like factors from numerator and denominator, you get
(x+1)x+(x-2)(x-1)=(x-2)(x+1)(-1)
Simplify the equation:
x^2+x+x^2-3x+2=-x^2+x+2
Add the opposite of all the terms on the right side to each side of the equation:
3x^2-3x=0
Factor out the GCF:
3x(x-1)=0
Set each factor equal to zero and solve:
3x = 0 or x-1=0
x = 0 or x = 1
After checking each answer in the original equation you will see both numbers work.  It's important to check because sometimes the answers can be extraneous (they don't work).
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3/8x-3/5y=33/88 4/7x+4/5y=37/35
Alinara [238K]
X=301/275
y=13/220
Solution
Please find the attached image to get the complete solution.

I used online calculator to solve the system

4 0
3 years ago
There are 20 small tropical fish swimming in a 55-gallon aquarium. What is the population density?
umka21 [38]

Answer:

The population density is 0.364 fish per gallon.

Step-by-step explanation:

The population density can be defined as the number of individuals (in this case, small tropical fish) per unit of area or volume. In this case, the volume of the aquarium (55 gallon).

The density can be calculated then as:

d=\dfrac{P}{V}=\dfrac{20\;\text{fish}}{55\;\text{gal}}\approx0.364\dfrac{\text{fish}}{\text{gal}}

The population density is 0.364 fish per gallon.

5 0
3 years ago
Find the lowest common multiple (LCM) of 6, 10 and 14. *
Leokris [45]

Answer:

C. 210

Step-by-step explanation:

Plugging it in directly

30/14=2.14 (not an integer)

140/6=23.33 (not an integer)

210/6=35

210/10=21

210/14=15

all of the above result in integers, so the answer is C.

D is not even checked because it is larger than 210

4 0
3 years ago
Read 2 more answers
I need help pls ! pls help me
Sholpan [36]

Answer:

x= 175°

Step-by-step explanation:

angles in a triangle add up to 180 degrees

85 + 90 = 175

180 - 175 = 5 (the missing angle not x)

angles on a straight line add up to 180 degrees

180 -  5 =175

5 0
3 years ago
Read 2 more answers
A politician has $4,200 to buy TV advertisements. If each advertisement costs $700, how many advertisements can the politician b
aksik [14]

Answer:

He can but 6 ads

Step-by-step explanation:

how i thought of it was what times 700 hundred gives me 4,200 and i used the math that i have been taught and put together 6

8 0
3 years ago
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