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Step2247 [10]
2 years ago
13

How many numbers between 50 and 500 are divisible by 7?​

Mathematics
2 answers:
Bess [88]2 years ago
6 0

Answer:

Step-by-step explanation:

50<7n<500

7.1<n<71.4

n=[8,71]

71-8+1

64

So there are 64 multiples of 7 between 50 and 500

weqwewe [10]2 years ago
5 0

Answer:

64 numbers

Step-by-step explanation:

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2 years ago
Maria, an experienced shipping clerk, can fill a certain order in 9 hours. Jim, a new clerk, needs 11 hours to do the same job.
tester [92]

Answer:

4 19/20 hours or 4 hours , 57 minutes

Step-by-step explanation:

Given

In 9 hours Maria can fill a certain order let Say X

In 9/9 hours Maria can fill   X/9 of the order

in 1 hour Maria can fill   X/9 of the order

__________________________________

In 11 hours Jim can fill a certain order let Say X

In 11/11 hours Maria can fill   X/11 of the order

in 1 hour Maria can fill   X/11 of the order

_____________________________________________

Therefore total order filled by them in one hour will sum of individual work done by them in one hour.

Mathematically,

total order filled by Jim and maria in one hour = work done by Jim in one + work done by Maria in one hour

total order filled by Jim and maria in one hour = 1/11 + 1/9

=> 1/11 + 1/9 \\=> (9 + 11)/11*9\\=> 20/99

=>20/99 of certain order is filled by both of them in one hour.

=>Total order is one. Hence, to get 1 from 20/99 we need to multiply it with its reciprocal (i.e 99/20) as 20/99 *99/20 = 1

now

=>20/99 of certain order is filled by both of them in 1 hour.

=>multiplying both order and hour with 99/20 we have

20/99 *99/20 of certain order is filled by both of them in 1* 99/20 hour

Thus total order is filled by them in 99/20 hours = 4 19/20 hours.

1 hour has 60 minutes

so 19/20 has 60*19/20 minutes = 57 minutes.

Working together, Jim and Maria   will  take 4 hours , 57 minutes  to fill the order.

3 0
2 years ago
Damian plans to do a lot of babysitting this summer. He charges $6.50 per hour and babysits for 3 hours. He has agreed to babysi
RoseWind [281]

Answer:

$195

Step-by-step explanation:

multiplying 6.50*3*10 = 195

7 0
3 years ago
Read 2 more answers
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