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aivan3 [116]
3 years ago
9

David can finish painting the room in six hours and his elder brother Anthony can finish it in four hours if both brothers paint

the room together how many hours will it take them and how many minutes
Mathematics
1 answer:
lbvjy [14]3 years ago
5 0

Answer:

2.4 hours

Step-by-step explanation:

David's time = 6 hours

Anthony's time = 4 hours

the combined time is given by the following formula

1/ (david's time) + 1/(anthony's time) = 1/total time

1/6 + 1/4 = 1/Total

4/24 + 6/24 = 1/Total

10/24 = 1/ total   (taking reciprocal of both sides)

24/10 = total

total time = 24/10 = 2.4 hours

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Kyle is making a frame for a rectangular piece of art. The length of the frame is 3 times the width, as shown below.
NeX [460]

Answer:

3.75 feet

Step-by-step explanation:

The length of the frame is 3 times the width.

Let the width be x.

The length will be 3x.

Kyle uses 10 feet of wood to make the frame. This means that the perimeter is 10 feet.

The perimeter of a rectangle is:

P = 2(L + W)

=> 10 = 2(3x + x)

=> 10/2 = 4x

5 = 4x

=> x = 5/4 = 1.25 feet

The width is 1.25 feet. The length is therefore:

1.25 * 3 = 3.75 feet

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Janice saved three times as much money as Annie if any saved $45 how much did Janet save?
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First answer is 135 and Second answer is 900
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Find the circumference of the circle with the given radius or diameter. (Use 3.14 for it) r=20
iogann1982 [59]

Answer:

C = 2πr = 2 * 3.14 * 20 = 125.6

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Read 2 more answers
This graph shows transformations between f(x) = 10x and g(x) = a · 10x. Identify the following functions. p(x) = 4 · 10x q(x) =
wel

Anwers:

1. line A

2. line D

3. line B

4. line C

Step-by-step explanation:

I think your question is missed of key information, allow me to add in and hope it will fit the original one.  

Please have a look at the attached photo.  

My answer:

Given the original function:

f(x) = 10x

and g(x) = a · 10x is the general from of all transformed functions from the above original function.

  • p(x) = 4 · 10x

The graph of this function is stretched vertically => line A

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The graph of this function is stretched vertically and is reflected through the x-asix => line D.

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The graph of this function is compressed vertically => line B

  • s(x) = (-1/4) x 10x

The graph of this function is compressed vertically and is reflected through the x-asix => line C

Hope it will find you well.

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Three adults and four children must pay $94 for their tickets
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13.42 dollars EACH if all the tickets cost the same
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