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kramer
2 years ago
12

Rob can mop a warehouse in 10 hours. Maria can mop the same warehouse in 11 hours. Find how long it would take them if they work

ed together.
Mathematics
2 answers:
Natali [406]2 years ago
4 0
The answer would be 21 good luck hope you get it correct
Wittaler [7]2 years ago
3 0

Answer:

It would take them  \frac{110}{21} or approximately 5.24 hours together

Step-by-step explanation:

Use the algebra work formula, \frac{1}{tb} = \frac{1}{t1} + \frac{1}{t2}, where tb is the time together, t1 is the time of one person individually, and t2 is the time of the other person.

Plug in 10 and 11:

\frac{1}{tb} = \frac{1}{t1} + \frac{1}{t2}

\frac{1}{tb} = \frac{1}{10} + \frac{1}{11}

Find the common denominator, then add the fractions together:

\frac{1}{tb} = \frac{11}{110} + \frac{10}{110}

\frac{1}{tb} = \frac{21}{110}

Cross multiply and solve for tb:

110 = 21tb

5.24 = tb

So, it would take them \frac{110}{21} or approximately 5.24 hours together

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<h3>✽ - - - - - - - - - - - - - - -  ~<u>Hello There</u>!~ - - - - - - - - - - - - - - - ✽</h3>

➷ Divide total cost by the number of files:

82.50/30 = 2.75

Multiply by 10:

2.75 x 10 = 25.5

The cost was $27.50

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7 0
2 years ago
20 weeks : 14 Days in simplest form? <br><br> Can you explain as well??
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5 0
3 years ago
A bug splatters on the windshield of a moving car. Describe the 1. Forces 2. Impulses 3. Momentum changes 4. And accelerations o
uranmaximum [27]

Answer:

acceleration=force/mass

Due to variation in the mass[ as same force as per magnitude acts on both of them] the acceleration developed in the bug will be more and the acceleration developed in the car is negligible.

impulse=change in momentum

The impulse of bug is more and that of car is small.

momentum changes=change in momentum

force=change in momentum/time of contact

the force exerted by car on the bug will be more than the converse

Total. momentum is conserved , so magnitude of change in momemtum or impulse is same. By Newtons third law, since the bug have smaller mass, its change in magnitude of velocity is larger.

Step-by-step explanation:

4 0
2 years ago
Please help!!!! i don’t understand any of this and really need it.
astraxan [27]

Answer:

B) 3.2 mi

Step-by-step explanation:

1. The midpoints: midpoint formula = <em>((x₁ + x₂)/2, (y₁+ y₂)/2)</em>

upper = ((6 + -4)/2, (8 + 0)/2) --><em> (1, 4)</em>

lower = ((-8 + 2)/2, (3 + -5)/2) --><em> (-3, -1)</em>

2. Distance: distance formula = <em>√((x₁ - x₂)² + (y₁ - y₂)²)</em>

√((1 + 3)² + (4 + 1)²) = √(16 + 25) = √41 ≈ 6.403... ≈ <em>6.4</em>

3. Scale: 6.4 * 0.5 mi = 3.2 mi

5 0
3 years ago
Factorise k(a³ + b³)-m(a³ + b³)​
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Answer:

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Step-by-step explanation:

8 0
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