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Blizzard [7]
3 years ago
14

Below are the data collected from two random samples of 500 American students on the number of hours they spend in school per da

y (rounded to the nearest hour): Number of hours in school per day 4 5 6 7 8 Sample A: Number of students 70 100 125 135 70 Sample B: Number of students 80 90 120 125 85 Meg concludes that students spend a mean of 7 hours in school each day. Tara thinks the mean is 6 hours. Who is correct—Meg or Tara? EXPLAIN YOUR ANSWER IN TWO OR THREE SENTENCES. Make sure to use facts to support your answer.
Mathematics
1 answer:
nexus9112 [7]3 years ago
7 0

Answer:

To find the mean you must add up all the numbers you have together and then divide the buy the amount of numbers you added. When you add these numbers up you get 30, and we have 5 numbers here, when we divide 30 by 5 we get 6. So, Tara is correct in saying that the mean is 6.

Step-by-step explanation:

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4 0
2 years ago
Can someone assist me with this?
Mnenie [13.5K]

Answer:

29: 7

Step-by-step explanation:

\frac{8}{3x - y}  =  \frac{5}{x + 3y}

<em>Cross</em><em> </em><em>multiply</em><em>:</em>

8(x + 3y) = 5(3x - y)

<em>Expand</em><em> </em><em>bracket</em><em>:</em>

8x + 24y = 15x - 5y

<em>Bring</em><em> </em><em>x</em><em> </em><em>terms</em><em> </em><em>to</em><em> </em><em>1</em><em> </em><em>side</em><em>,</em><em> </em><em>y</em><em> </em><em>terms</em><em> </em><em>to</em><em> </em><em>the</em><em> </em><em>other</em><em>:</em>

15x - 8x = 24y + 5y

<em>Simplify</em><em>:</em>

<em>7x = 29y</em>

<em>Divide</em><em> </em><em>by</em><em> </em><em>7</em><em> </em><em>on</em><em> </em><em>both</em><em> </em><em>sides</em><em>:</em>

x =  \frac{29}{7} y

<em>Divide</em><em> </em><em>both</em><em> </em><em>sides</em><em> </em><em>by</em><em> </em><em>y</em><em>:</em>

<em>\frac{x}{y}  =  \frac{29}{7}</em>

∴ The ratio of x to y is 29:7.

5 0
3 years ago
35 miles per hour to feet per minute
guapka [62]
35 miles is equal to 35*5280, which is 184,800.
Now we know that it takes one hour to travel 184,800.
The next step is to divide 184,800 by 60, which is 3,080.
So it takes one minute to travel 3,080 feet. Hope this helps.
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3 years ago
2y + 3y -3y -6(y + 2) = -y + 6
irinina [24]
The answer is y= -6
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8 0
2 years ago
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The eight graders' goal is more than the teachers' goal.

The teachers' goal is less than the eight graders' goal.
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