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Natali5045456 [20]
3 years ago
10

Three postal workers can sort a stack of mail in 35 ​minutes, 30 ​minutes, and 210 ​minutes, respectively. Find how long it take

s them to sort the mail if all three work together.
The time it takes for all three to complete the job is ___ minutes.
Mathematics
2 answers:
Levart [38]3 years ago
6 0

Answer:

92 minutes

Step-by-step explanation:

Find the average of the numbers by adding them all together, then dividing the sum by three.

Tema [17]3 years ago
3 0

Answer:

The time it takes for all three of them to complete the job is 15 minutes.

Step-by-step explanation:

Three postal workers can sort a stack of mail in 35 minutes, 30 minutes and 210 minutes respectively .

The rate for each person to stack a mail can be represented as

rate1 = 1/35

rate2 = 1/30

rate3 = 1/210

let t = time in minutes

1/35 + 1/30 + 1/210 = 1/t

find the common factor of the denominator

(6 + 7 + 1)/210

14/210 = 1/t

cross multiply

14t = 210

divide both sides by 14

t = 210/14

t = 15

The time it takes for all three of them to complete the job is 15 minutes.

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Step-by-step explanation:

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3 years ago
Complete the function remove_all(L, x) so that, given a list L and a target value x, it returns a copy of the list that excludes
tia_tia [17]

Answer:

Code is given below along with explanation and output.

Step-by-step explanation:

we can use the method of list comprehension to achieve the given task.

In a list comprehension, we create a sub-list of elements which satisfy specific conditions. the condition i !=x makes sure that x would be excluded in the modified list.

def remove_all(L, x):

   return [i for i in L if i != x]

L = [1, 2, 3, 4, 5, 6, 4, 3, 2, 4 ]

print('Before =',L)

L = remove_all(L, 4)

print('After =',L)

Output:

Before = [1, 2, 3, 4, 5, 6, 4, 3, 2, 4]

After = [1, 2, 3, 5, 6, 3, 2]

As you can see we have successfully removed the multiple occurrence of x=4 while preserving the order of the list.

4 0
4 years ago
Help..................................
butalik [34]

Answer:

c

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Pablo bought 4 CDs that were each the same price. Including sales tax, He paid a total of $70.40. Each CD had a tax of $1.10. Wh
Ann [662]

Answer:

$16.50

Step-by-step explanation:

Total cost: $70.40

Per CD w/ tax: $70.40 ÷ 4 = $17.60

Price of CD w/out tax: $17.60 - $1.10 = $16.50

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Please show work if possible
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Step-by-step explanation:

Reflection in y-axis means g(x) = f(-x)

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