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Lena [83]
3 years ago
12

An experienced employee can enter tax data into a computer tree times as fast as a new employee. Working together, it takes them

9hrs. How long would it take the experienced employee working alone?
Mathematics
1 answer:
disa [49]3 years ago
3 0

Answer:

12 hours

Step-by-step explanation:

Let x hours be the time needed for the experienced employee, then 3x hours is time needed for the new employee.

Then, the experienced employee completes \dfrac{1}{x} of the whole work per hour and the new employee completes \dfrac{1}{3x} of the whole work per hour.

Altogether the can complete

\dfrac{1}{x}+\dfrac{1}{3x}=\dfrac{4}{3x}

of the whole work per hour and need

\dfrac{1}{\frac{4}{3x}}=\dfrac{3x}{4}

hours to finish the whole work.

Working together, it takes them 9 hours, then

\dfrac{3x}{4}=9\\ \\3x=36\\ \\x=12\ hours

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B is the correct answer , it is incorrect.

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3 years ago
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2+2 idk what is the answer and im just confused of what it is
Alecsey [184]
<h3>Answer:</h3>

2+2 = 4

<h3>Very Simple!</h3>

▶Add 2 to 2 , you may count it with your fingers.

<h2>Additionally Information:</h2>

  • (-) This sign means subtraction i.e. you must take out!

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This are for beginners ✔

<h2>Hope you understand</h2>
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15. Gwen had a painting that had a length of 5 feet and a width of 3.5 feet.
victus00 [196]

Answer:

D. 15 by 10.5

Step-by-step explanation:

If the original painting has dimensions of 5 by 3.5, and has a scale factor of 1, then if we are trying to find the dimensions of the same thing but with a scale factor of 3, then we need to multiply the dimensions by 3.

5*3 = 15

3.5*3 = 10.5

The new dimensions are 15 by 10.5.

Hope this helps. Have a nice day.

5 0
3 years ago
What is the domain and range of y=x^2?
r-ruslan [8.4K]
Hi there! the best way of solving this is picturing out what the graph might look like. Let's assume you had the graph of a parabola y=x^2. You know that for every x you substitute, there'd always be a value for y. Thus, the domain is ALL REAL NUMBERS or from -INFINITY to + INFINITY. The range on the other hand is different. We know that any number raised to the second power will always yield a positive integer or 0. Thus, y=x^2 won't have any negative y-values as the graph opens upward. Therefore, the range is: ALL REAL NUMBERS GREATER THAN OR EQUAL TO 0. or simply: 0 to +INFINITY. 

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4 years ago
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Which is the equation of a libe that has a slope of 1/2 and passes through (2,-3)​
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Answer:

Step-by-step explanation:

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