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Vinil7 [7]
3 years ago
9

115 students could sign up to hear three different speakers for career day. 70 students heard the nurse speak, 52 heard the fire

fighter, and 78 heard the webmaster. Some students heard more than one speaker. The results are shown in the table below.
___________________________________
Number of students | Speaker
15 | All three
20 | Nurse and firefighter
30 | Webmaster and nurse
12 | Firefighter only

How many students signed up for Webmaster only?
Mathematics
1 answer:
Crank3 years ago
4 0
I think it is 28 but, i'm not completely sure. Hopes it helps
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Find the solution of the system of equations. <br>7x -- 8y = -23<br>7x – 7y = -14<br><br>(?,?)​
gtnhenbr [62]

Answer:

(7,9)

Step-by-step explanation:

6 0
3 years ago
A water cooler can hold 50 pt of water.
Nookie1986 [14]

Water cooler holds = 50 pt of water

1 L≈1.06 qt (which is the value of US liquid quart)

1.06 qt = 2.12 pt (which is the value of US liquid pint)

So when we are calculating how many liters of water cooler holds, divide the 50pt with 2.12pt

50pt/2.12pt = 23.6 Liters

<span>So 23.6 is the correct answer.</span>

6 0
3 years ago
29. Family income in the middle class: Bauer et al. (2011) identified the median income of a middle-class family in their sample
GREYUIT [131]

Answer:

No it is not

Step-by-step explanation:

The median is 84200

The mean is 85300

Low income is 65100

High income is 103400

From this information, we can see a skewed data. The mean would not be a good estimate value. Rather the center (median) would be more appropriate.

When we calculate the middle value for this data

65100+103400 = 168500/2 = 84250

84250 is closer to the median score of 84200. The median is best in the presence of outliers.

8 0
3 years ago
Working alone, Ryan can dig a 10 ft by 10 ft hole in five hours. Castel can dig the same hole in six hours. How long will it tak
aleksley [76]

.
Rates:
Ryan: 1 hole per 5 hours
Castel: 1 hole per 6 hours
.
Let x = time if working together
then
x(1/5 + 1/6) = 1
x(6 + 5) = 30
11x = 30
x = 30/11
x = 2.7273 hours
or
x = 2 hours and 44 minutes
3 0
3 years ago
Read 2 more answers
tammy is riding her bicycle. she rides for 27.5 kilometers at a speed of 11 kilometers per hr. how many hours does she ride?
luda_lava [24]

2.5 hours. You take the total amount of kilometers and divide it by the kph (kilometers per hour), which in this case is 11. If you do that, you'll get your answer of 2.5 hours or 2 hours and 30 minutes.

3 0
4 years ago
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