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k0ka [10]
3 years ago
9

A new photocopier works 4 times as fast as an old one. When the machines work together, a university can produce all its staff m

anuals in 28 hours. Find the time it would take each machine, working online, to complete the job.
Mathematics
1 answer:
Usimov [2.4K]3 years ago
6 0

The old photocopier can make x manuals in an hour. The new photocopier can make 4x. Combined, they made 5x manuals in an hour.

In one hour they can make 1/28 of the manuals.

1/(28*5)=1/140 is the rate.

The new photocopier can make all the manuals in 4/140 or 35 hours.

The old one can make them in 140 hours.

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Segment addition, how do u solve it? Step by step.
weeeeeb [17]

Answer:

x=7  DO=25  OG=35

Step-by-step explanation:

4x-3+2x+21=60            4(7)-3                  2(7)+21

4x+2x   -3+21                 28-3=25             14+21=35

6x+18=60                     DO=25                  OG=35

60-18=42

6x=42

42/6=7

x=7

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3 years ago
Plz g0ive me solution
Serga [27]

Answer:

separate the x from the numbers it will make the equation easier

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The 22 students who answered juice would represent the smallest wedge in a pie chart.
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3 years ago
How do u do this problem
atroni [7]
Alexis and 3 friends buy:
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First we would multiply all the food prices by 4, since there is 4 people in total.
4 x 4 = $16
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Now we're adding all the prices together. 
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At this point, we're going to make the expression, using all the steps that we did.
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We used parenthesis to show that those expressions need to be done first before anything else.

This is how we make an expression and we find the total answer.

The expression would be: ( 4 x 4 ) + ( 1 x 4 ) + ( 2 x 4 )
The total cost would be: $28

Hope this helps!~
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3 years ago
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