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
o-na [289]
3 years ago
13

X/6.4=4 solve for X it’s for pre al 8th grade

Mathematics
1 answer:
sergeinik [125]3 years ago
8 0

Answer:  x=25.6

Step-by-step explanation:Look at pic to see how it is solved.

Times 6.4 on both sides which gives you 25.6 .

You might be interested in
I would like for some to help me because I really need help
torisob [31]

Answer:

whats the question

Step-by-step explanation:

........

7 0
3 years ago
Simplify the expression <br>(2x-6) - (4x+4)​
ollegr [7]

Answer:

-2x - 10

Step-by-step explanation:

(2x-6) - (4x+4)​    multiply (4x+4)​  by -1   -1(4x + 4) = -4x - 4

2x - 6 - 4x - 4  Re-arrange

2x - 4x - 6 - 4

-2x - 10

5 0
3 years ago
What is 400 percent as a mixed number?
prohojiy [21]
You can put 400/100 to get the fraction 4/1 or 4, it is not a mixed number though. So the final answer is 4
8 0
3 years ago
4. Find the value of x.
oksano4ka [1.4K]

Answer:

x = 50°

Step-by-step explanation:

The sum of the measures of the angles of a quadrilateral is 360°

360 - 40 - 80 - 110 = 130

130 is the measure of the quad that is adjacent to the angle of x° and is supplementary to that angle also.

Therefore, x = 180 - 130 = 50

7 0
3 years ago
Assume that population mean is to be estimated from the sample described. Use the sample results to approximate the margin of er
Vikentia [17]

Answer:

ME=1.998 \frac{4}{\sqrt{64}}=0.999 \approx 1

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 =69 represent the sample mean for the sample  

\mu population mean

s=4.0 represent the sample standard deviation

n=64 represent the sample size  

Assuming the X follows a normal distribution

X \sim N(\mu, \sigma)

The sample mean \bar X have the following distribution:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

The margin of error for the sample mean is given by this formula:

ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}

Since we have the sample standard deviation we can estimate the margin of error like this:

ME=t_{\alpha/2}\frac{s}{\sqrt{n}}

The next step would be find the value of \z_{\alpha/2}, \alpha=1-0.95=0.05 and \alpha/2=0.025

We can find the degrees of freedom like this:

df=n-1=64-1=63

And we can find the critical value with the following code in excel for example: "=T.INV(0.025,63)" and we got:

t_{\alpha/2}=\pm 1.998

And the margin of error would be :

ME=1.998 \frac{4}{\sqrt{64}}=0.999 \approx 1

3 0
3 years ago
Other questions:
  • Convert this decimal into its fractional<br> form, simplified completely.<br> 0.700
    14·2 answers
  • Solve (x+1&lt;4) and (x-8&gt;-7)
    6·1 answer
  • A pack of gum costs 75 cents. That is 3 cents less than three times what the pack cost 20 years ago. Which equation could be use
    7·1 answer
  • A beverage is made by mixing 2 parts of water with 3 parts of fruit juice. How many parts of water are mixed with 1 part of frui
    14·2 answers
  • The temperature at 9am was 13.6 deg. Celsius. The temperature at 9pm was 6.4 deg. Celsius. What was the average drop in temperat
    8·2 answers
  • Helen designs a rectangle with an area of 225 square units. her rectangle is the largest rectangle( that is the rectangle with l
    10·1 answer
  • Help me I don’t understand what to do
    7·1 answer
  • Find the value of X in each case:
    7·1 answer
  • Please help, look at the photo, it’s urgent
    9·1 answer
  • 1. In the first week, he spent $16 on lunches. How much was in his account then?​
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!