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4 years ago

An Electrician charges $30 for a service call plus $75 per hour of service. If he charged 210 how many hours did he work?

Mathematics

1 answer:

valkas [14]4 years ago

8 0

Answer:

2.4 hours Electrician works.

Step-by-step explanation:

Let us assume that the number of hours Electrician works be x.

As given

An Electrician charges $30 for a service call plus $75 per hour of service.

If Electrician charged $210.

Than the equation becomes

30 + 75x = 210

75x = 210 - 30

75x = 180

$x =\frac{180}{75}$

x =2.4 hours

Therefore 2.4 hours Electrician works.

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4 years ago

The bar graph shows the number of school days Jalen had homework and did not have homework during the first six months of

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Given:

In July:

Number of days he has done the homework = 6

Number of days he has not done the homework = 4

In August:

Number of days he has done the homework = 16

Number of days he has not done the homework = 7

In September:

Number of days he has done the homework = 14

Number of days he has not done the homework = 4

In October:

Number of days he has done the homework = 14

Number of days he has not done the homework = 8

In November:

Number of days he has done the homework = 16

Number of days he has not done the homework = 4

In December:

Number of days he has done the homework = 5

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To find the months in which the difference between the number of days with homework and with no homework greater than 6.

Now,

In July,

The difference between the number of days with homework and with no homework = 6-4 = 2

In August,

The difference between the number of days with homework and with no homework = 16-7 = 9

In September,

The difference between the number of days with homework and with no homework = 14-4 = 10

In October,

The difference between the number of days with homework and with no homework = 14-8 = 6

In November,

The difference between the number of days with homework and with no homework = 16-4 = 12

In December,

The difference between the number of days with homework and with no homework = 10-5 = 5

Hence,

In 3 months the difference between the number of days with homework and with no homework greater than 6 and these are: August, September, November.

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3 years ago

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