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Alla [95]
3 years ago
10

It takes Kali 8 minutes to sweep a porche and it takes shawns 11 minutes to sweep the same porch how long would it take them if

they worked together
Mathematics
1 answer:
Tems11 [23]3 years ago
3 0

Answer:

2.368 minutes

Step-by-step explanation:

1/8 + 1/11 = 1/x

11x/88x + 8x/88x = 88/88x

19x = 45

x = 2.37

sorry if this is wrong!!

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Can someone help me thankyou <3
grigory [225]

Answer:

P(G)= 7/10

B, 1, P(not B)

1- 8/10, p(Y)= 2/10

Step-by-step explanation:

hope this helps

correct me if this is wrong

6 0
3 years ago
Usian bolt can run 100meters in 9.58 seconds . my car can drive 100kilometers an hour. which is faster, is it faster to travel 1
Mashcka [7]

Answer:

Your car is faster of course

Step-by-step explanation:

100 km would be 100000 meters. Then you would need to know that if Usain bolt ran 100 meters every 9.54 sec then in 100000 meters he would have ran 9540 seconds which is also known has 159 minutes, which is more than 1 hour so your car is faster.

5 0
2 years ago
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
-10y + 9x = -9<br> 10y + 5x = -5
RoseWind [281]
The answer is (-1,0) or x=-1 and y=0 :)
5 0
3 years ago
Given the figure below with m<br> HELP ASAP. I’LL MARK YOU BRAINLIEST!!
Naya [18.7K]

Answer:

c

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
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