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amm1812
3 years ago
10

Sally can paint a room in 7 hours while it takes Steve 4 hours to paint the same room. How long would it take them to paint the

room if they worked​ together?
Mathematics
1 answer:
crimeas [40]3 years ago
4 0
The formula for this is
worker 1 * worker 2 / worker 1 + worker 2

7 * 4 / 7 + 4 =
28 / 11 =
2.54 hours


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Answer:

A. y = 3x/4

Step-by-step explanation:

 a proportional relationship between x and y is a straight line passing through the origin (0, 0).

The equation must be in the form y = kx.

y = 3x/4

y = 3/4x

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5. Find the triangle similar to AABC at the right. Question 5
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Lai drove for 2 hours at a constant speed of 55 mph. How many total miles did she travel?
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plz...

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3 0
4 years ago
Filipo is building a rectangular sandbox . The length of the sandbox is 1 foot longer than twice the width of the sandbox .the p
Alla [95]

Answer:

Part A : D.) 2w + 2(2w+ 1) = 29

Part B : Length of the sandbox is 10 feet.

Step-by-step explanation:

Given,

Perimeter = 29 ft

We need to find the equation for the perimeter and also the length of the sandbox.

Solution,

Let the width of the sandbox be 'w'.

Now as per question said;

The length of the sandbox is 1 foot longer than twice the width of the sandbox.

So we can say that;

Length = 2w+1

Now we know that the perimeter is equal to the sum of twice of length and width.

framing in equation form, we get;

Perimeter = 2(2w+1)+2w

we have given the perimeter, so on substituting the value, we get;

29=2(2w+1)+2w

Hence The equation used to find the width is  29=2(2w+1)+2w.

Now we solve for 'w'.

Applying distributive property, we get;

4w+2+2w=29\\\\6w+2=29

Subtracting both side by '2' we get

6w+2-2=29-2\\\\6w=27

Dividing both side by 6 we get;

\frac{6w}{6}=\frac{27}{6}\\\\w=4.5\ ft

Width of the sandbox = 4.5 ft

Length of the sandbox = 2w+1=2\times4.5 +1 = 9+1=10\ ft

Hence Length of the sandbox is 10 feet.

3 0
3 years ago
A boat has a speed of 28 miles per hour in still water. the boat travels 80 miles upstream and 80 miles downstream on a river, c
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80+ 80= 160 miles

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