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
aleksley [76]
3 years ago
6

X = 3y +9 2x – 3y = 9help plz​

Mathematics
1 answer:
Dominik [7]3 years ago
6 0

Answer:

Their are caculators online search the type of math it is then put caculator for example exponents caculator

Step-by-step explanation:

You might be interested in
PLEASE HELP ASAP!!!!!!!!!
viva [34]

Answer:

A: 5:1

B. 2:10

Step-by-step explanation:

Please mark brainliest!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

3 0
3 years ago
Jaxson drove 4 miles in i of an hour. If he drove at a constant rate, how far did he
statuscvo [17]

Answer:

Socratic app

Step-by-step explanation:

it will help you

5 0
3 years ago
The head librarian at the Library of Congress has asked her assistant for an interval estimate of the mean number of books check
Verdich [7]

Answer:

n=(\frac{1.960(150)}{90})^2 =10.67 \approx 11

So the answer for this case would be n=11 rounded up to the nearest integer

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

\bar X represent the sample mean for the sample  

\mu population mean (variable of interest)

\sigma =150 represent the population standard deviation

n represent the sample size  

Solution to the problem

The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

The confidence interval for this case is given by: (740, 920)

We can find the estimate for the mean and we got:

\bar X = \frac{740+920}{2} = 830

and the margin of error is given by :

ME = \frac{920-740}{2}= 90

The margin of error is given by this formula:

ME=z_{\alpha/2}\frac{s}{\sqrt{n}}    (a)

And on this case we have that ME =90 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

n=(\frac{z_{\alpha/2} s}{ME})^2   (b)

The critical value for 95% of confidence interval now can be founded using the normal distribution. And in excel we can use this formla to find it:"=-NORM.INV(0.025;0;1)", and we got z_{\alpha/2}=1.960, replacing into formula (b) we got:

n=(\frac{1.960(150)}{90})^2 =10.67 \approx 11

So the answer for this case would be n=11 rounded up to the nearest integer

5 0
2 years ago
Polynomial<br> Simplify The expression to a<br> in standard form<br> (x+3) (2x²+9 x-2)
maw [93]

Answer:

2x3+15x2+25x−6

Step-by-step explanation:

Multiply each term in the first expression by each term in the second expression and combine like terms.

6 0
3 years ago
Please help ASAP 40 points!!
Nonamiya [84]

Answer:

b) -5^x + 3x - 2

Step-by-step explanation:

(f-g) = -5^x - 4 - (-3x - 2) = -5^x - 4 + 3x + 2 = -5^x +3x - 2

therefore, the answer is b) -5^x + 3x - 2

hope this helps! <3

4 0
2 years ago
Other questions:
  • What's the name of the line segment in the diagram below? A. B. C. D.
    12·2 answers
  • A rectangular fish tank has a base that is 8 inches by 7 inches. How much water will it take to fill the tank to a depth of 5 in
    11·1 answer
  • My mum was 27 when I was born. 8 years ago she was twice as old as I shall be in 5 years time. How old am I now?
    9·1 answer
  • -3(x-5)=45<br> Please answer asap!
    14·1 answer
  • What is the length of DE
    14·1 answer
  • Suppose that a box is being towed up an inclined plane as shown in the figure. Find the force w needed to make the component of
    11·1 answer
  • Six students share 8 granola bars equally. How many granola bars does each student get?
    5·2 answers
  • I needa know the answer quick..ty
    11·1 answer
  • Somebody help me plz!! It’s due tomorrow
    9·1 answer
  • 1. As shown in the diagram below, the radius of a cone is 2.5 cm and its
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!