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Ket [755]
3 years ago
8

Can anyone help me with this question??

Mathematics
1 answer:
eduard3 years ago
6 0

Answer:

It is the 3rd one.

Step-by-step explanation:

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Three workers have to do a certain job. The first worker can finish the job in 8 hours. The second worker can finish the job in
mestny [16]

Working together three workers would take 1 hour 36 minutes to finish the job

<em><u>Solution:</u></em>

Given that first worker can finish the job in 8 hours

So in one hour, first worker can do \frac{1}{8} th of the work

The second worker can finish the job in 4 hours

So in one hour, second worker can do \frac{1}{4} th of the work

The third worker can also finish the job in 4 hours

So in one hour, third worker can do \frac{1}{4} th of the work

<em><u>The three workers working together in 1 hour can do:</u></em>

\frac{1}{8} + \frac{1}{4} + \frac{1}{4} = \frac{1 + 2 + 2}{8} = \frac{5}{8}

The three worker can thus do \frac{5}{8} th of the work in one hour

Hence the three of them together can finish the work in \frac{8}{5} hours

\frac{8}{5} = 1\frac{3}{5} hours

Thus working together three workers would take 1 hour 36 minutes to finish the job

8 0
3 years ago
Annabelle and Navene are multiplying (4275)(4372).
Anastasy [175]

Answer: no

Step-by-step explanation: no because 4275 times 4372 equals 18,690,300 but in the first one she says it’s equal to 42 + 375 + 2 wich is no we’re near that number and on the second one she says it is equal to 42⋅375⋅2 wich is also wrong

7 0
2 years ago
Solve the system of linear equations by elimination <br> X + 3Y =5<br> -x -y = -3
zmey [24]

Answer:

(2,2)

Step-by-step explanation:

If you have any questions about the way I solved it, don't hesitate to ask

7 0
2 years ago
read The question and give Me The answers for number 19 This is a Tough one it wants Me To click on The graph
shtirl [24]

Answer:

(0, 5)

Step-by-step explanation:

At the time the ball is thrown time t = 0

The corresponding height at t = 0 is 5 ft

This is the point (0, 5) on the graph

7 0
3 years ago
Each day, Martin lifts weights for 10 minutes and runs on the treadmill for 25 minutes. Wrire two equivalent expressions and the
algol [13]
10 x 7 = ?(70)      25 x 7 = ?(175)     175 + 70 = 245
4 0
3 years ago
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