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vovangra [49]
3 years ago
15

Samantha and Luis are attempting to determine the average number of library books that seventh-grade students check out at one t

ime. Samantha surveys every other seventh-grade student leaving the library. She samples a total of 40 of the 200 seventh graders. Luis samples 30 of the 200 seventh grade students at random in the school cafeteria. Whose sample is the most random?
Mathematics
2 answers:
Harrizon [31]3 years ago
8 0

Answer:

A

Step-by-step explanation:

brainliest pls i need it

BartSMP [9]3 years ago
4 0
Luis’ sample would be the most random, because not everyone in the cafeteria might check out books from the library, but since everyone Samantha surveyed was in the library already, most of the people she surveyed would be more consistent in their responses.
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An athlete can run 9 kilometers in 1 hour. If the athlete runs at that same average speed for 30 minutes, how far will the athle
butalik [34]

Answer:

Step-by-step explanation:

1 hour = 60 minutes

1 kilometers = 1000m

9 kilometers = 9*1000 = 9000 m

Distance traveled in 60 minutes = 9000 m

Distance traveled in 1 minute = 9000/60

Distance traveled in 30 minutes

=\frac{9000}{60}*30\\\\=\frac{9000}{2}\\\\

= 4500m = 4.5 km

4 0
3 years ago
32x2 – 24x = 0<br> What’s the answer to this?
Vlad [161]

Answer:

x=0      x = 3/4

Step-by-step explanation:

32x^2 – 24x = 0

Factor out 8x

8x(4x -3)

Using the zero product property

8x = 0   4x-3 =0

x=0       4x=3

x=0      x = 3/4

3 0
4 years ago
Adam is a salesperson in a video store. He is paid $100 every week plus a commission of $5 on every DVD he sells. Which equation
sweet [91]

Answer:

X = (150 - 100) / 5

Step-by-step explanation:

To determine how many DVDs Adam sold in the week, knowing that he charges a fixed amount of $ 100 plus $ 5 for each sale he makes, and in the week he charges a total of $ 150, the following calculation must be made:

X (number of DVDs sold) = (150 (weekly profit) - 100 (fixed amount)) / 5 (value of each DVD)

X = (150 - 100) / 5

X = 50/5

X = 10

So, during the week Adam sold 10 DVDs.

4 0
3 years ago
180 euros to the uk exchange rate was €1.2 to £1 how much did he get in £ sterling
Nataliya [291]

Here you can use proportion:

The ratio betwen €1.2 to £1

is the same as the ratio between €180 to £x

Mathematically this means that

\dfrac{1.2}{180} =\dfrac{1}{x}.

Now

1.2\cdot x=180\cdot 1\\\\ x=\dfrac{180}{1.2} \\ \\x=150

Answer: €180 is £150

6 0
4 years ago
Read 2 more answers
Let u = &lt;-9, 4&gt;, v = &lt;8, -5&gt;. Find u - v.
Deffense [45]

Answer:

-17

Step-by-step explanation:

-9-8

3 0
3 years ago
Read 2 more answers
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