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Studentka2010 [4]
3 years ago
12

A large random sample of American students in seventh grade showed that 20%20\% 20% 20, percent of them were reading below grade

level.
Based on this data, which of the following conclusions are valid?
A.20% of all American students in seventh grade were reading below grade level.
B. 20% of this sample was reading below grade level, but we cannot conclude anything about the population.
Mathematics
2 answers:
WITCHER [35]3 years ago
7 0

Answer:

The answer is A i must took the test

Step-by-step explanation:

deff fn [24]3 years ago
6 0

Answer:

the answer is A

Step-by-step explanation:

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The blue lake trail is 11 3/8 miles long. Gemma has hiked 2 1/3 miles each hour for 3 hours. How far is she from the end of the
sergeinik [125]

Answer:

4\frac{3}{8}miles

Step-by-step explanation:

Given that Gemma has hiked 2 1/3 mile each hour for a total of 3 hours, you can multiply her rate by her time to find the total distance:

d = rt or d = 2 1/3(3)

2\frac{1}{3}=\frac{7}{3}

Multiply: \frac{7}{3}*\frac{3}{1}=7miles

Now, that the total length of the trail, 11 3/8 miles, and subtract the distance that Gemma has gone already:

11 3/8 - 7 = 4\frac{3}{8}miles

4 0
3 years ago
jose reads 39 books in 1994, 27 books in 1995, and 35 books in 1996. how many books did he read over 3 years
Afina-wow [57]

Answer:101

Step-by-step explanation:

U just add all the numbers together

5 0
3 years ago
Aunty Joan packs a packet of sweets to Alice and Olivia. Alice and Olivia share sweets in the ratio 7:3. Alice gives 3 sweets to
aivan3 [116]

Initially, Alice had 28 sweets and Olivia 12 sweets.

Step-by-step explanation:

First assume that Aunty Joan has x number sweets.

Alice and Olivia shared the x sweets in a ration of 7:3, this means

Alice had 7/10 x sweets and Olivia had 3/10 sweets.

Alice gives 3 sweets to Olivia, Alice will remain with ;

\frac{7}{10} x-3

Then the new ratio changes to 5:3 which means Alice will have 5/8 x number of sweets.

Equate the number of sweets for Alice in the two cases, which is

\frac{5}{8}x=\frac{7}{10} x-3\\ \\\frac{7}{10} x-\frac{5}{8} x=3\\

\frac{56x-50x}{80} =3\\\\\\\frac{6}{80} x=3\\\\\\6x=80*3\\\\\\x=240/6\\\\x=40

So there were 40 sweets at first

Using the ratio of 7:3 then

Alice had 7/10 *40 = 28 sweets

Olivia had 3/10*40= 12 sweets

Alice gave Olivia 3 sweets, so she will remain with 28-3 =25 sweets. Olivia will now have 15 sweets.The new ratio will be 25:15 simplified as 5:3.

Learn More

Ratio : brainly.com/question/11095585

Keywords : Ratio

#LearnwithBrainly

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3 years ago
6a+ -12a plz explain (a=1/2) I don't know evaluating expressions
Marianna [84]

Plug in the 1/2 where the a’s are answer is -3

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3 years ago
ANSWER THE QUESTION FOR BRAINLIEST
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The first one is the answer
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