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baherus [9]
2 years ago
6

Pls help (it is for a frend)

Mathematics
1 answer:
In-s [12.5K]2 years ago
3 0

Answer:

76.02%

Step-by-step explanation:

Took the test

Mark brainliest :)

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max2010maxim [7]

Answer:

20 students prefer math



4 0
3 years ago
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Henry has collected data to find that the typing speeds for the students in a typing class has a normal distribution. What is th
Mekhanik [1.2K]

Answer: 0.8413

Step-by-step explanation:

Given : Henry has collected data to find that the typing speeds for the students in a typing class has a normal distribution.

Mean : \mu=47

Standard deviation : \sigma= 4

Let x be the random variable that represents the typing speeds for the students.

The z-score :-

z=\dfrac{x-\mu}{\sigma}

For x= 51

z=\dfrac{51-47}{4}=1

Using the standard normal distribution table ,the probability that a randomly selected student has a typing speed of less than 51 words per minute :-

P(x

Hence, the probability that a randomly selected student has a typing speed of less than 51 words per minute = 0.8413

8 0
3 years ago
Select all the ordered pairs that satisfy the function y = 3x + 5. A. (2, –1) A. , (2, –1) B. ( –3, –4) B. , ( –3, –4) C. ( 4, 1
Ne4ueva [31]

Answer:

B. ( –3, –4)

C. ( 4, 17 )

Step-by-step explanation:

Function: y = 3x + 5

Using method of elimination

A. (2, –1)

x = 2, y = -1

-1 = 3 (2) + 5

-1 ≠ 11

This option is incorrect!

B. ( –3, –4)

x = -3, y = -4

-4 = 3 (-3) + 5

-4 = - 9 + 5

-4 = -4

This option is correct!

C. ( 4, 17 )

x = 4, y = 17

17 = 3 (4) + 5

17 = 12 + 5

17 = 17

This option is correct!

D. ( 3, 8 )

x = 3, y = 8

8 = 3 (3) + 5

8 = 9 + 5

8 = 14

This option is incorrect!

5 0
3 years ago
Simplify using distributive property 4(z+2)+2(3-z)
riadik2000 [5.3K]

Answer:

2z+14

Step-by-step explanation:

you multiply

4*z   =4z

4*2   =8

and then you multiply

2*3=6

2*-z=-2z

the answer is 2z+14

5 0
3 years ago
Polygon ABCD is rotated 90 degrees counterclockwise about the origin to create polygon
Aleonysh [2.5K]

answer with an example is attached below

4 0
3 years ago
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