which two operations are needed to write the expression that repersents "four times the difference of a number and three"

It snowed from 7:43 to 11:37 how long was it snowing

gogolik [260]

3 hours 54 minutes is the answer

3 0

2 years ago

Read 2 more answers

I need to find x can someone please help

PIT_PIT [208]

Answer:

$\boxed{\boxed{\tt x=87^{\circ}}}$

Step-by-step explanation:

We know that a triangle has 3 sides, A triangle's interior angles add up to 180 degrees.

Now, let's write this as an equation:

$\tt x^{\circ}+37^{\circ}+56^{\circ}=180^{\circ}$

The missing angle is 180° minus the sum of the other two angles.

$\tt x^{\circ}=180^{\circ}-56^{\circ}-37^{\circ}$

Subtract the numbers:

$\tt 180^{\circ}-56^{\circ}-37^{\circ}=87^{\circ}$

$\tt x=87^{\circ}$

<u>________________________________</u>

4 0

2 years ago

Read 2 more answers

According to the U.S. National Transportation Safety Board, the number of airline accidents by year from 1983 to 2006 were 23, 1

Lera25 [3.4K]

Answer:

$\bar X= 33.79167$

$s= 12.06497$

$SE= \frac{s}{\sqrt{n}}= \frac{12.06497}{\sqrt{24}}=2.463$

$Median= \frac{30+31}{2}= 30.5$

Step-by-step explanation:

For this case we have the following data:

23, 16, 21, 24, 34, 30, 28, 24, 26, 18, 23, 23, 36, 37, 49, 50, 51, 56, 46, 41, 54, 30, 40, and 31

We can calculate the sample mean with the following formula:

$\bar X = \frac{\sum_{i=1}^n X_i}{n}$

And replacing we got:

$\bar X= 33.79167$

Then we can calculate the standard deviation with this formula:

$s= \sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}}$

And replacing we got:

$s= 12.06497$

And the sample size for this case is n =24. We can calculate the standard error with this formula:

$SE= \frac{s}{\sqrt{n}}= \frac{12.06497}{\sqrt{24}}=2.463$

And the median for this case since the sample size is 24 first we need to sort the data on increasing order and we got:

16 18 21 23 23 23 24 24 26 28 30 30 31 34 36 37 40 41 46 49 50 51 54 56

And for this case the median would be the average from the position 12 and 13 and we got:

$Median= \frac{30+31}{2}= 30.5$

4 0

3 years ago

A cube is built with inside dimensions of 10 inches. The material is 0.2 inches thick. Use a Taylor series approximation to find

larisa86 [58]

Answer:

V(x,y,z) ≈ 61.2 in

Step-by-step explanation:

for the function f

f(X)=x³

then the volume will be

V(x,y,z)= f(X+h) - f(X) , where h= 0.2 (thickness)

doing a Taylor series approximation to f(x+h) from f(x)

f(X+h) - f(X) = ∑fⁿ(X)*(X-h)ⁿ/n!

that can be approximated through the first term and second

f(X+h) - f(X) ≈ f'(x)*(-h)+f''(x)*(-h)²/2 = 3*x²*(-h)+6*x*(-h)²/2

since x=L=10 in (cube)

f(X+h) - f(X) ≈ 3*x²*(-h)+6*x*(-h)²/2 = 3*L²*h+6*L*h²/2 = 3*L*h*(h+L)

then

f(X+h) - f(X) ≈ 3*L*h*(h+L) = 3* 10 in * 0.2 in * ( 0.2 in + 10 in ) = 61.2 in

then

V(x,y,z) ≈ 61.2 in

V real = (10.2 in)³-(10 in)³ = 61 in

8 0

3 years ago

90 is 1 half of what

rodikova [14]

90 is 1 half of 180. This is because 90 times 2 is 180. If you were to check your work and divide 180 in half you would get 90.

Hope this helps :)

4 0

3 years ago

Read 2 more answers

which two operations are needed to write the expression that repersents "four times the difference of a number and three"​

which two operations are needed to write the expression that repersents "four times the difference of a number and three"