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Lisa [10]
3 years ago
15

Which equation has x=4 as the solution

Mathematics
1 answer:
erma4kov [3.2K]3 years ago
5 0
(1) step by step below

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nikdorinn [45]
I think it’s the second option
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2 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
SOMEONE PLS HELP ME WITH THIS
jolli1 [7]

Answer:

x = 11.25

Step-by-step explanation:

-6 = 0.8x - 15

Add 15 to both sides;

-6 + 15 = 0.8x - 15 + 15

9 = 0.8x

Divide both sides by 0.8;

x = 11.25

4 0
2 years ago
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What is the circumference of a circle with a diameter of 5 feet? Use 3.14 for pie.
sammy [17]

Answer:

A. 15.7 ft

Step-by-step explanation:

circumference = 2πr

radius= half the diameter 5/2=2.5

2(3.14)(2.5)=15.7 ft

8 0
2 years ago
Please help check if this is correct?
Likurg_2 [28]

Answer:

50 is correct

Step-by-step explanation:

did my math but I know you need it quick so sorry for brief answer

4 0
3 years ago
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