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monitta
2 years ago
5

Guys plz help me!!!!!!!!

Mathematics
1 answer:
Rainbow [258]2 years ago
3 0

Answer:

63.62

Step-by-step explanation:

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The system of equations
cupoosta [38]

Answer:

z = -12

Step-by-step explanation:

The given system of equations is:

xy/(x + y) = 1 ...........................(1)

xz/(x + z) = 2...........................(2)

yz/(y + z) = 3...........................(3)

From (1): x + y = xy

=> y = xy - x

y = x(y - 1)

x = y/(y - 1).......................................(4)

From (2): 2(x + z) = xz

=> 2x + 2z = xz

2x = xz - 2z

2x = z(x - 2)

z = 2x/(x - 2) ....................................(5)

From (3): 3(y + z) = yz

=> 3y + 3z = yz

3y = yz - 3z

3y = z(y - 3)

z = 3y/(y - 3)....................................(6)

Comparing (5) and (6)

2x/(x - 2) = 3y/(y - 3)

2x(y - 3) = 3y(x - 2)

2xy - 6x = 3xy - 6y

6(y - x) = xy .................................(7)

But from (1): xy = x + y

Using this in (7), we have

6(y - x) = x + y

6y - y - 6x - x = 0

5y - 7x = 0

5y = 7x

x = 5y/7................................................(8)

Using this in (4)

5y/7 = y/(y - 1)

1/(y - 1) = 5/7

(y - 1) = 7/5

y = 1 + 7/5

y = 12/5..........................................(9)

Using this in (8)

x = 5(12/5)/7 = 12/7 .......................(10)

Using (10) in (5)

z = 2x/(x - 2)

z = 2(12/7) ÷ (12/7 - 2)

= 24/7 ÷ -2/7

= 24/7 × (-7/2)

= -24/2 = -12

z = -12.

4 0
3 years ago
Which of the following sequences is not arithmetic?
Yanka [14]

Answer:

option c

Step-by-step explanation:

c doesnt follow a pattern

3 0
3 years ago
Read 2 more answers
Round 4,752 all the way
Flura [38]
Nearest 10: 4750 
<span>Nearest 100: 4800 </span>
<span>Nearest 1000: 5000 </span>
<span>Nearest 10000: 0</span>
8 0
2 years ago
Read 2 more answers
A machine made 3 1/2 pencils in 1/6 of a minute. It made at a rate of how many per minute?
andrew11 [14]

Answer:

21 per min

Step-by-step explanation:

8 0
2 years ago
How to i get the aswner for 3^5(8×9)
Agata [3.3K]
Hey there Emilybarnhart20,

How do I get the answer for 3^5(8x9)

Answer:

Step 1 : Finish the equation in the brackets

3^5 (72)

Step 2: Find the answer for 3^5

243 (72)

Step 3 : Multiply 243 with 72

243 (72) = 17496

Hope this helps :D

<em>~Top♥</em>
3 0
3 years ago
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