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Irina-Kira [14]
2 years ago
14

Find the value of x 2/3 x -4 = 2

Mathematics
1 answer:
Dovator [93]2 years ago
7 0
Answer:
X=9

Explanation
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The length of time taken on the SAT for a group of students is normally distributed with a mean of 2.5 hours and a standard devi
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Answer:

Step-by-step explanation:

Since the length of time taken on the SAT for a group of students is normally distributed, we would apply the formula for normal distribution which is expressed as

z = (x - u)/s

Where

x = length of time

u = mean time

s = standard deviation

From the information given,

u = 2.5 hours

s = 0.25 hours

We want to find the probability that the sample mean is between two hours and three hours.. It is expressed as

P(2 lesser than or equal to x lesser than or equal to 3)

For x = 2,

z = (2 - 2.5)/0.25 = - 2

Looking at the normal distribution table, the probability corresponding to the z score is 0.02275

For x = 3,

z = (3 - 2.5)/0.25 = 2

Looking at the normal distribution table, the probability corresponding to the z score is 0.97725

P(2 lesser than or equal to x lesser than or equal to 3)

= 0.97725 - 0.02275 = 0.9545

6 0
3 years ago
Which expression is the correct one?
Zarrin [17]
According to the logarithmic property of base change, the correpta answer is option one or the first.
 The logarithmic property of base change says that
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3 years ago
The level of calcium in the blood of healthy young adults follows a normal distribution with mean $\mu=10$ milligrams per decili
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2 years ago
What are supersonic speeds
Darya [45]

Answer:

speeds above 343 m/s

Step-by-step explanation:

the faster you go the faster the supersonic

6 0
2 years ago
Read 2 more answers
Use the given x and y values to write a direct variation<br> equation.<br> x = 5, y = 25
Anuta_ua [19.1K]

Answer:

k= 1/5

Step-by-step explanation:

x is proportional to y

x = ky (k is const.)

k = x/y

k= 5/25

k = 1/5

7 0
2 years ago
Read 2 more answers
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