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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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a) Saturn is 9.1 * 10^8 miles from the sun and earth is 9.3 * 10^7 miles from the sun. By what distance is one planet closer to
Sonbull [250]

Answer:

8.17 * 10^8

Step-by-step explanation:

Saturn is 9.1 * 10^8 miles from the sun, and earth is 9.3 * 10^7 miles from the sun. From this, we can see that Saturn is much farther from the sun than the earth.

To find the distance of one planet closer to the sun than the other planet, we can subtract 9.3 * 10^7 from 9.1 * 10^8.

Original expression: 9.1 * 10^8 - 9.3 * 10^7

Convert both sides to 10^7: 91 * 10^7 - 9.3 * 10^7

Subtract: 81.7 * 10^7

Simplify: 8.17 * 10^8

Let me know if this helps!

6 0
3 years ago
Malia measures the longer side of a dollar bill using a ruler at school. Which of the following is most likely the quantity she
sergey [27]

Answer:

6.14 inches

Step-by-step explanation:

The one side of the dollar bill is 6.14 inch. The 6.14 inches of the dollar approximates the 156.1 mm. When Malia measures the longer side of a dollar bill from her rule it will be approximately 6.14 inches in length. The ruler normally has inches and cm sides. Very few rulers have mm scales. The most probable scale that malia would have measure is in inches.

5 0
3 years ago
Completely factor the given expression over the integers.<br><br> (Correct gets brainliest)
elena-14-01-66 [18.8K]

Answer:

50

Step-by-step explanation:

would it be 50 because you the q to the power of 2 is 2q. Then you would subtract to the other side of the equation so it would be -100=-2q. After you would divided the -2 in -2q on both sides and -100/-2 is 50. So your answer is q=50

7 0
3 years ago
out of 30 students surveyed 17 have a dog based on these results predict how many of the 300 students in the school have a dog
Ira Lisetskai [31]
The whole school would have 170 students that have a dog
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3 years ago
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sattari [20]
57/61 is in simplest form
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