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exis [7]
3 years ago
5

(X-4)/(x+1)-x/(x-1)=0

Mathematics
1 answer:
GREYUIT [131]3 years ago
5 0

Answer:

  x = 2/3

Step-by-step explanation:

\dfrac{x-4}{x+1}-\dfrac{x}{x-1}=0\\\\\dfrac{(x-4)(x-1)-x(x+1)}{(x+1)(x-1)}=0\\\\\dfrac{-6x+4}{x^2-1}=0 \quad\text{0 when the numerator is zero}\\\\x-\dfrac{2}{3}=0 \quad\text{divide by $-6$}\\\\x=\dfrac{2}{3}

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A scientist has two solutions, which she has labeled Solution A and Solution B. Each contains salt. She knows that Solution A is
Yuri [45]

Answer:

x= 44 ounces y = 66 ounces  

Step-by-step explanation:

Distribution would be an increase to find 80% salt.

Where we use 4/5 = 80 but use here 4/5.

We find 19/20 but just say 95 for solution B =

Let x = the number of ounces of Solution A

Let y = the number of ounces of Solution B

x + y = 110        y = 110 - x

(70x + 95y) = 4/5 x 110

70x + 95y = 88    

70x + 95 y = 88

70x + 95 (88 - x) = 8800 make units equal or for start convert decimalization = same units as 2nd multiplied value.

70x + 8360 - 88x = 8800

-10x - 8360 - 8800 = y

-10x = 440

x = 44 ounces

y = 110- 44

y =  66 ounces  

4 0
3 years ago
Read 2 more answers
Danny charges $40 for 4 hours of swimming lessons, Martin charges $85 for 5 hours of swimming lessons. Who offers a better deal?
Ratling [72]

Answer:

Danny does

Step-by-step explanation: 40 / 4 = 10

                                              85 / 5 = 17

10 is less than 17 meaning that Danny is offering a better deal.

Hope this helps!

4 0
3 years ago
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There is a bag filled with 3 blue and 5 red marbles.
icang [17]

Answer:

4/6 chance

One is taken at random, we do not know the colour so we just take away 1 from both colours, this leaves us with 4/6 chance.

3 0
3 years ago
Tasha is buying a cd that is regularly $12.99 and is on sale for 1/4 off.
tatiyna

9.74$

IS the final answer

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3 years ago
Solve for X: 2(x + 5) + 3(x – 2) = 29<br> please explain too! will mark brainliest
8090 [49]

Answer:

5

Step-by-step explanation:

2x+10+3x-6=29

5x+4=29

5x=25

x=5

3 0
4 years ago
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