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zavuch27 [327]
2 years ago
10

Find the value of the numerical expression. 43 x 41 x 42

Mathematics
1 answer:
saw5 [17]2 years ago
6 0

Answer:

74046 is the correct answer

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In a psychology class, 32 students have a mean score of 93.2 on a test. Then 16 more students take the test and their mean score
liraira [26]

Answer:  83.3

Step-by-step explanation:

Formula :

\text{Mean}=\dfrac{\text{Sum of all observations}}{\text{Number of observations}}                   (1)

\Rightarrow\ \text{Sum of all observations}=\text{Mean x (Number of observations)}           (2)

Given : In a psychology class, 32 students have a mean score of 93.2 on a test.

By Using (2) , Sum of scores of 32 students = 93.2 x 32 =2982.4   (3)

Then 16 have a mean score of 63.4.

Again, By Using (2) , Sum of scores of 16 students = 63.4 x 16 =1014.4   (4)

Total students = 32+16 = 48

Add (3) and (4) , we get combined score of 48 students = 2982.4+ 1014.4

=3996.8

Now , by using (2) , the  mean score of all of these students together

=\dfrac{3996.8}{48}=83.2666666667\approx83.3

Hence, the mean score of all of these students together is 83.3.

4 0
3 years ago
Cot(x)=-3. find sin(x)
ASHA 777 [7]

Answer:

sin(x)=1/\sqrt10

Step-by-step explanation:

The trigonometric identities involve trigonometric functions. Here we will be using Trigonometric identity

sin²x  = 1 /( 1+cot²x )

now cot(x)= -3

⇒ cot²x= (-3)²

⇒ cot²x= 9

sin²x= 1/( 1+9)

⇒ sin²x = 1/10

taking under root on both the sides we get

√sin²x=\sqrt1/\sqrt10

⇒ sin(x)=± 1/\sqrt10

6 0
3 years ago
720 seconds ( 1hour/60minutes)=12 hours
Vilka [71]
What's the question here?
6 0
3 years ago
What does 191 and 484 have in common?
SIZIF [17.4K]

Answer:

first and third digit are the same.

not prime numbers,

191 yes but 484 no.

4 0
2 years ago
Original price: $95; Markdown: 10%...Show your work
Rasek [7]
$95.00 minus $9.50 equals $85.50
4 0
2 years ago
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