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weeeeeb [17]
3 years ago
11

morad and Elias are car mechanics. morad can complete a certain task in x hours. Elias can complete the same task in y hours. wh

ich equation correctly describes their combined hourly rate of work ? A) x+y=x+y B) 1/x + 1/y = 1/xy C) 1/x + 1/y = x+y/xy D) 1/x + 1/y = 1/x+y
Mathematics
1 answer:
Irina-Kira [14]3 years ago
6 0
C) 1/x + 1/y = x+y/x.y is the right answer. Why?

1- Morad will complete his task It's C)   1<span>/x + 1/y = x+y/xy. Why?

Morad complted his task in in "x" hours.  and
 
</span>in 1 hour he will complete 1/x of the task

2- Elias completed his task in in "y" hours.  and 
 
in 1 hour he will complete 1/y of the task:

3- 1/x + 1/y = (x+y)/xy ( reduce to same denominator)
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10. Use grids to draw all the possible arrays
Alexus [3.1K]

Answer:

Please check the attached figure a to visualize the array grid for 5, 7 and 11.

Step-by-step explanation:

As the given number be 5, 7 and 11.

An array is basically the display of things in rows and columns. Students tend to draw arrays for multiples of a given number.

For example,  2 × 1 means the objects are placed in two rows and 1 column.

The numbers 5, 7 and 11 are prime numbers as they have only two factors  

  • A prime number consists of just two factors, 1 and the number itself
  • For example, 3 is prime number because the only factors of 3 are 1 and 3

So,  

As the factors of 5 are 1 and 5. Therefore, the possible number of drawing all the possible arrays of 5 will be two which are

  • 1 × 5 and 5 × 1

As the factors of 7 are 1 and 7. Therefore, the possible number of drawing all the possible arrays of 7 will be two which are

  • 1 × 7 and 7 × 1

As the factors of 11 are 1 and 11. Therefore, the possible number of drawing all the possible arrays of 11 will be two which are

  • 1 × 11 and 11 × 1

Please check the attached figure a to visualize the array grids for 5, 7, and 11.

Keywords: arrays, number, prime number

Learn more about drawing arrays for number from brainly.com/question/13278394

#learnwithBrainly

4 0
3 years ago
Using long division how much is 5/8
oee [108]
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Which equation is the inverse of f(x)=LaTeX: \frac{1}{x+2}1 x + 2 A. LaTeX: f^{-1}\left(x\right)=\frac{1}{x}+2f − 1 ( x ) = 1 x
inna [77]

Answer:

g^{-1}x = \frac{1-2x}{x}

Step-by-step explanation:

Given the function g(x)= \frac{1}{x+2}, we are to find the inverse of the function and this can be done y following the simple steps:

Step 1: Replace y with g(x)

g(x)= \frac{1}{x+2}\\y= \frac{1}{x+2}

Step 2: Interchange x with y

x= \frac{1}{y+2}

Step 3: Make y the subject of the formula;

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Step 4: Replace y as g^{-1}(x)

g^{-1}x = \frac{1-2x}{x}

Hence the inverse of the function is g^{-1}x = \frac{1-2x}{x}

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