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borishaifa [10]

2 years ago

5

Students in the science lab are measuring the mass of an object on a triple beam balance. The object has a mass of 38 grams. Com

plete the table below with the absolute and percent error for each students’ measurement. Round your answer to the nearest tenths place.

1 answer:

const2013 [10]2 years ago

5 0

Answer:

Step-by-step explanation:

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At a school with 100? students, 33 were taking? Arabic, 32 ?Bulgarian, and 40 Chinese. 9 students take only? Arabic, 12 take onl

Stels [109]

Answer: The answer is 4 and 32.

Step-by-step explanation: Let "A", "B" and "C" represents the set of students who were taking Arabic, Bulgarian and Chinese respectively.

The, according to the given information, we have

$n(A)=33,~~n(B)=32,~~n(C)=40,~~n(A\cap B)=14.$

Let 'p' represents the number of students who take all the three languages, then

$n(A\cap B\cap C)=p.$

Also,

$n(A)-n(A\cap B)-n(A\cap C)+n(A\cap B\cap C)=9\\\\\Rightarrow n(A\cap B)+n(A\cap C)=24+p~~~~~~~~~~~~~~(a),\\\\n(A\cap B)+n(B\cap C)=20+p~~~~~~~~~~~~~~(b),\\\\n(B\cap C)+n(A\cap C)=20+p~~~~~~~~~~~~~~~(c).$

From here, we get after subtracting equation(c) from (b) that

$n(A\cap B)=n(A\cap C)=14.$

Therefore,

$p=14+14-24=4,$ and from equation (a), we find

$n(B\cap C)=24-14=10.$

Thus,

$n(A\cap B\cap C)=4$ and

$n(A\cup B\cup C)=n(A)+n(B)+n(C)-n(A\cap B)-n(B\cap C)-n(A\cap C)+n(A\cap B\cap C)\\\\\Rightarrow n(A\cap B\cap C)=33+32+40-9-12-20+4\\\\\Rightarrow n(A\cap B\cap C)=68.$

Thus, the number of students who take all the three languages is 4 and the number of students who take none of the languages is 100-68 = 32.

5 0

2 years ago

Solve the proportion. Show your work. PLEASE

Dmitrij [34]

$\bf \cfrac{3}{x+1}=\cfrac{5}{11}\implies (11)3=(x+1)5\implies 33=5x+5
\\\\\\
28=5x\implies \cfrac{28}{5}=x\implies 5\frac{3}{5}=x$

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2 years ago

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What numbers have been drawn the most in powerball

UkoKoshka [18]

Answer:

numbers are 1, 26, 18, 10, 2, 12, 11, 9, 6, and 20.

Step-by-step explanation:

8 0

2 years ago

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14/8 as a mixed number

horsena [70]

To change 14/8 into a fraction, you have to divide.

Solution

1. 8/14

2. 1 R 6

3. Denominator 8 stays the same

4. Final answer 1 3/4

7 0

2 years ago

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Nikki packed unit cubes into a prism, as shown. Which statement about the volume of the box is true?

elena-14-01-66 [18.8K]

See the explanation

<h2>Explanation:</h2>

Hello, recall that you need to write complete questions in order to get exact answers. Here we have a missing diagram so I can help you in a general way. A prism is a three dimensional shape that has two identical ends (flat faces

) and the same cross section all along its length. A cube is a special type of prism having six identical square sides. So the volume of a prism given the length of a side as s is:

$V=s^3$

For example, suppose we have a box formed by unit cubes as indicated in the figure below, so the length of one side of the blue box will be:

$s=1+1+1+1+1+1+1+1=8units$

So the volume of the blue box is:

$V=8^3 \\ \\ V=512units^3$

<h2>Learn more:</h2>

Cube: brainly.com/question/12539359

#LearnWithBrainly

3 0

3 years ago