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
Natali [406]
3 years ago
5

How to work out [ (6³-9)÷23] 4

Mathematics
1 answer:
lana [24]3 years ago
5 0
[ (6^3-9):23]\cdot 4 = [ (216-9):23]\cdot 4 =[ 207:23]\cdot 4 =9\cdot 4=36


You might be interested in
5x+6+1x in simplest form
Readme [11.4K]
5x+6+1x
= (5x+1x)+ 6 (combine like terms)
= 6x+6
= 6(x+1) (distributive property)

The final answer is 6(x+1)~
8 0
3 years ago
A 4 3/4-foot pipe has a 3 1/4-foot pipe fitted to it. How long is the new pipe?
lesantik [10]
1/4 is the anwers because you need to reduce the fraction
3 0
3 years ago
Read 2 more answers
The Wisconsin Dairy Association is interested in estimating the mean weekly consumption of milk for adults over the age of 18 in
Stolb23 [73]

Answer:

ME = 1.653 *\frac{7.9}{\sqrt{300}}= \pm 0.75

±0.75 ounce

Step-by-step explanation:

Assuming this complete question: The Wisconsin Dairy Association is interested in estimating the mean weekly consumption of milk for adults over the age of 18 in that state. To do this, they have selected a random sample of 300 people from the designated population. The following results were recorded: xbar=34.5 ounces, s=7.9 ounces Given this information, if the leaders wish to estimate the mean milk consumption with 90 percent confidence, what is the approximate margin of error in the estimate?

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=34.5 represent the sample mean

\mu population mean (variable of interest)

s=7.9 represent the sample standard deviation

n=300 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)

In order to calculate the critical value t_{\alpha/2} we need to find first the degrees of freedom, given by:

df=n-1=300-1=299

Since the Confidence is 0.90 or 90%, the value of \alpha=0.1 and \alpha/2 =0.05, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.05,199)".And we see that t_{\alpha/2}=1.653

And the margin of error is given by:

ME = 1.653 *\frac{7.9}{\sqrt{300}}= \pm 0.75

±0.75 ounce

4 0
3 years ago
Read 2 more answers
20000×50×45×0×23×5×6+229+466+7+5+8+9+1+2+3+45+6+7+8+9+10. Hope you like question don't answer if you don't want to. Have a great
Lemur [1.5K]
815? but have a great day as well!
4 0
3 years ago
Find a linear second-order differential equation f(x, y, y', y'') = 0 for which y = c1x + c2x3 is a two-parameter family of solu
Alisiya [41]
Let y=C_1x+C_2x^3=C_1y_1+C_2y_2. Then y_1 and y_2 are two fundamental, linearly independent solution that satisfy

f(x,y_1,{y_1}',{y_1}'')=0
f(x,y_2,{y_2}',{y_2}'')=0

Note that {y_1}'=1, so that x{y_1}'-y_1=0. Adding y'' doesn't change this, since {y_1}''=0.

So if we suppose

f(x,y,y',y'')=y''+xy'-y=0

then substituting y=y_2 would give

6x+x(3x^2)-x^3=6x+2x^3\neq0

To make sure everything cancels out, multiply the second degree term by -\dfrac{x^2}3, so that

f(x,y,y',y'')=-\dfrac{x^2}3y''+xy'-y

Then if y=y_1+y_2, we get

-\dfrac{x^2}3(0+6x)+x(1+3x^2)-(x+x^3)=-2x^3+x+3x^3-x-x^3=0

as desired. So one possible ODE would be

-\dfrac{x^2}3y''+xy'-y=0\iff x^2y''-3xy'+3y=0

(See "Euler-Cauchy equation" for more info)
6 0
3 years ago
Other questions:
  • What is one plus one?<br> what is one plus one divided by .17?
    14·2 answers
  • F(x) = 10x - 15. What value of x makes f(x) = 75?
    5·2 answers
  • What is the value of 7.6a + 16.2c, when a = -6 and c = -4?
    8·2 answers
  • I need help with 3 and 4
    7·1 answer
  • for each 24mm of coloured fabric Gordan uses 1.2cm of white fabric. Express the amount of white fabric to coloured fabricas a ra
    15·1 answer
  • 4.4471336•10^2/2.900996•10^3 in scientific notation
    12·1 answer
  • 66666666666666666666666666666666666666666=866666+56565656565656565656565656565656564=
    12·2 answers
  • * 5.) Write the following in standard form.* 5.8709 x 107
    6·1 answer
  • CAN SOMEONE HELP ME PLEASE ASAP!
    8·1 answer
  • At a contest spped a car teavels 75 miles in 60 minutes how far deos the car travel in 18 minutes if you get stuck consider usin
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!