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3 years ago

Multiplying numbers by place value

Mathematics

1 answer:

Alla [95]3 years ago

8 0

What are the answer choices?

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Can anyone PLEASE HELP ME WITH THIS QUESTION?

Ipatiy [6.2K]

Answer: x=34

Step-by-step explanation:

straight lines = 180

triangles = 180

180-145 = 35

111+35=146

180-146=34

4 0

3 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.

5 0

3 years ago

On a coordinate plane, a parabola opens up. It goes through (negative 8, negative 2), has a vertex at (negative 5, negative 6.5)

Nady [450]

Answer:

Step-by-step explanation:

<h2>Hope it helps</h2>

8 0

2 years ago

HELP ASAP;The tree diagram represents an<br> experiment consisting of two trials.

andriy [413]

Answer:

P(A) = 0.5

Step-by-step explanation:

Look from the tree root (left) and find A.

When you reach the first branch that shows A, the probability is on it's left, so

P(A) = 0.5

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3 years ago

Please help !!<br> 12x + 14 = 6x + 7 (+) 9x - 5 find the value of x

Aloiza [94]

Answer:

x=4

Step-by-step explanation:

6 0

3 years ago