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3 years ago

Someone help plzzzzz

Mathematics

1 answer:

slavikrds [6]3 years ago

4 0

Answer:

8.5

Step-by-step explanation:

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What is the area of the combined rectangle

Art [367]

Answer:Find The area of each rectangle is base × height.

Step-by-step explanation: Find the area of each rectangle by multiplying its base by its height. Add the areas of the rectangles together to get the total area. We split this composite shape into 2 rectangles.

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2 years ago

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.

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3 years ago

When graphing an inequality on a number line, if you have ≥ or ≤

pantera1 [17]

Answer:

true

Step-by-step explanation:

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3 years ago

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HELP ME WITH THIS QUESTION PLEASE

Shkiper50 [21]

Answer:

Step-by-step explanation:

1. 7x + 4

2. 3x - 2

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2 years ago

Use a calculator to find the given value. Round to four decimal places.

KiRa [710]

After using a calculator to find sin 21 degrees and rounding it to four decimal places, I got 0.3584. The correct answer between all the choices given is the first choice. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

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3 years ago

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