1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
stich3 [128]
3 years ago
9

Solve for "W" -1 > 2W + 7

Mathematics
2 answers:
jeka57 [31]3 years ago
8 0

-1>2W+7

-8>2w

w = -8/2 = -4

w>-4

igor_vitrenko [27]3 years ago
4 0
-1 > 2w + 7

-8 > 2w

-8/2 > 2w/2

-4 > w

hope this helps
You might be interested in
The taxi and takeoff time for commercial jets is a random variable x with a mean of 8.9 minutes and a standard deviation of 2.9
Eva8 [605]

Answer:

a) 0.2981 = 29.81% probability that for 37 jets on a given runway, total taxi and takeoff time will be less than 320 minutes.

b) 0.999 = 99.9% probability that for 37 jets on a given runway, total taxi and takeoff time will be more than 275 minutes

c) 0.2971 = 29.71% probability that for 37 jets on a given runway, total taxi and takeoff time will be between 275 and 320 minutes

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

Mean of 8.9 minutes and a standard deviation of 2.9 minutes.

This means that \mu = 8.9, \sigma = 2.9

Sample of 37:

This means that n = 37, s = \frac{2.9}{\sqrt{37}}

(a) What is the probability that for 37 jets on a given runway, total taxi and takeoff time will be less than 320 minutes?

320/37 = 8.64865

Sample mean below 8.64865, which is the p-value of Z when X = 8.64865. So

Z = \frac{X - \mu}{\sigma}

By the Central Limit Theorem

Z = \frac{X - \mu}{s}

Z = \frac{8.64865 - 8.9}{\frac{2.9}{\sqrt{37}}}

Z = -0.53

Z = -0.53 has a p-value of 0.2981

0.2981 = 29.81% probability that for 37 jets on a given runway, total taxi and takeoff time will be less than 320 minutes.

(b) What is the probability that for 37 jets on a given runway, total taxi and takeoff time will be more than 275 minutes?

275/37 = 7.4324

Sample mean above 7.4324, which is 1 subtracted by the p-value of Z when X = 7.4324. So

Z = \frac{X - \mu}{s}

Z = \frac{7.4324 - 8.9}{\frac{2.9}{\sqrt{37}}}

Z = -3.08

Z = -3.08 has a p-value of 0.001

1 - 0.001 = 0.999

0.999 = 99.9% probability that for 37 jets on a given runway, total taxi and takeoff time will be more than 275 minutes.

(c) What is the probability that for 37 jets on a given runway, total taxi and takeoff time will be between 275 and 320 minutes?

Sample mean between 7.4324 minutes and 8.64865 minutes, which is the p-value of Z when X = 8.64865 subtracted by the p-value of Z when X = 7.4324. So

0.2981 - 0.0010 = 0.2971

0.2971 = 29.71% probability that for 37 jets on a given runway, total taxi and takeoff time will be between 275 and 320 minutes

7 0
2 years ago
Tony spent $11.52 for some pens that were on sale for $.72 each how many pens did Tony bye
Semenov [28]
He will bye 16 pens hope that helps u
6 0
3 years ago
A recipe needs 4 cups of milk and 6 cups of grated cheese. what is the ratio of the number of cups of grated cheese in the recip
ryzh [129]
The correct answer is A) 2:3 because 4/6 simplified is 2/3
5 0
3 years ago
What are the like terms in the expression 7y + 4 +4x + 7​
lorasvet [3.4K]

Answer:

4, 7

Step-by-step explanation:

7y + 4 +4x + 7​

The only like terms are the constants 4 and 7

7y is like yogurt and 4x is like xrays, we don't  mix them

7 0
3 years ago
Read 2 more answers
Members of a baseball team raised $1780.50 to go to a tournament. They rented a
Alina [70]

Answer: 17 players

Step-by-step explanation: 1780.50-1151.50=629, 629/37 = 17

3 0
2 years ago
Other questions:
  • the initial price for a horse is $39000.It is discounted by 40% and then by further 14%.Find the price of the item.
    9·1 answer
  • Your parents will retire in 20 years. They currently have $300,000 saved, and they think they will need $1,450,000 at retirement
    11·1 answer
  • David's cafe sold 302 cups of coffee on monday. They sold 169 on Tuesday. How many more cups did they sell on Monday?
    15·1 answer
  • How do you simplify this
    12·2 answers
  • Please help with #35 I don’t get it and I’m really stressed
    5·2 answers
  • Trisha plans to invest $1,800.00 in a savings account. Savings account 1 earns 6% simple interest and savings account 2 earns 6%
    7·1 answer
  • My baby brother needs help 7z+4-9z=8 <br> what is z=
    15·1 answer
  • (-4/5) (15/8) (7/3) (-1)
    13·1 answer
  • Giving brainiest please help
    12·1 answer
  • What is the opposite operation of squaring? Using this opposite operation, rewrite the equation from question 1 so s is by itsel
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!