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
strojnjashka [21]
3 years ago
9

Can someone help me solve this system of linear equations by the addition method?

Mathematics
1 answer:
schepotkina [342]3 years ago
3 0
4x-8y=4
3y=1
X=5/3
Y=1/3
You might be interested in
Solve : -2 1/3 - (-5) =?
Debora [2.8K]

Answer:

2 2/3

Step-by-step explanation:

-2 1/3-(-5)

-2 1/3+5

5-2 1/3

2 2/3

7 0
3 years ago
8. The 1st student flipped a fair coin 7 times
REY [17]
My guess is he gets heads about half the time
4 0
3 years ago
In a certain section of Southern California, the distribution of monthly rent for a one-bedroom apartment has a mean of $2,275 a
KATRIN_1 [288]

Answer:

100% probability of selecting a sample of 65 one-bedroom apartments and finding the mean to be at least $2,095 per month

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 estabilishes 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 $2,275 and a standard deviation of $290.

This means that \mu = 2275, \sigma = 290

Sample of 65:

This means that n = 65, s = \frac{290}{\sqrt{65}}

Finding the mean to be at least $2,095 per month

This is 1 subtracted by the p-value of Z when X = 2095. So

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

By the Central Limit Theorem

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

Z = \frac{2095 - 2275}{\frac{290}{\sqrt{65}}}

Z = -5

Z = -5 has a p-value of 0.

1 - 0 = 1

100% probability of selecting a sample of 65 one-bedroom apartments and finding the mean to be at least $2,095 per month

7 0
3 years ago
PLEASE HELP :)
Gnom [1K]

Answer:

Math can help us do many things that are important in our everyday lives. ... As a parent, you could talk to your teen about how you use math in your daily life. You ... Share with your child the examples of everyday math applications, which are listed ... Your teen will learn skills in algebra class that will help them with money.

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
The number that we are dividing by is called __________​
pychu [463]
Dividend


1233494902177284928172738392 (this is just bc my answer has to be long don't mind thiss)
4 0
3 years ago
Read 2 more answers
Other questions:
  • A car can travel 400 miles on a full tank of petrol. A more efficient car can travel 32% further. How many miles can it travel o
    13·1 answer
  • 3.50 plus an additional 6% tax.what is the price after the tax?
    11·1 answer
  • A vendor sells fifteen sweatshirts for $15 each, thirty t-shirts for $10 each, and forty hats for $8 each. What is the average p
    11·1 answer
  • How many trout are estimated to be present if a random sample of 5,000 fish is collected from the lake?
    10·2 answers
  • Solve the equation 6=y-5 which step can you use to solve the equation 6+y-5
    6·1 answer
  • 7thh grade math help me plzzzzzzz
    8·1 answer
  • Answers for both boxes please ​
    14·1 answer
  • La diferencia comun es?
    11·1 answer
  • The sum of 1/7 + 2/5​
    9·2 answers
  • Can anyone help? Most brainiest for the correct answer!!
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!