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vichka [17]
3 years ago
14

????????????????????????????

Mathematics
2 answers:
rewona [7]3 years ago
7 0

Let h equal the number of hours the electrician works.

We can write the equation like this:

90h + 60 = 600

Solve for h.

90h + 60 = 600

~Subtract 60 to both sides

90h + 60 - 60 = 600 - 60

~Simplify

90h = 540

~Divide 90 to both sides

90h/90 = 540/90

~Simplify

h = 6

Therefore, the electrician work for 6 hours.

The correct answer is Option 1.

Best of Luck!

Vesna [10]3 years ago
7 0

Answer:

90h + 60 = 600

Step-by-step explanation:

because 90 is the amount charged per hour, the variable should be multiplied with that. U then add the $60 travelling fee.

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Alfonso runs 10 km at an average speed of x km/h.
puteri [66]

Step-by-step explanation:

Note that t = d/r where t is time, d is distance, and r is rate/speed.

We can come up with two equations with the information given and the equation:

t_1 hr = (10 km)/(x km/hr)

t_2 hr = (12 km)/(x - 1 km/hr)

<em>where t_1 is the time taken to run the 10km the first day and t_2 is the time taken to run the 12km the second day.</em>

We know that 30 minutes is 1/2 of an hour and that t_1 is 30 minutes less than t_2 (as stated in the question). Therefore, we can write:

t_1 = t_2 - 1/2

Substituting the values we derived:

(10 km)/(x km/hr) = (12 km)/(x - 1 km/hr) -1/2

Then we can evaluate by multiplying by 2x(x-1) on both sides:

20(x-1) = 24x - (x)(x-1)

20x - 20 = 24x - x^2 + x

x^2 -5x -20 = 0

And we are done.

I hope this helps! :)

6 0
3 years ago
5
pogonyaev
120 in 2 minutes is 60 per minute so 60x5 is 300
Answer:300
5 0
2 years ago
Can someone please help me!!
Sauron [17]
I think that the answer could be D
8 0
3 years ago
Read 2 more answers
If u see this forget it, I typed it in the wrong spot
Arte-miy333 [17]
Ok then um so ya ok thx for the points though
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