which one doesn't belong
​

Answer:

7(1+3)

Step-by-step explanation:

Answer:

2x

Step-by-step explanation:

Answer:

34.5%

Step-by-step explanation:

When the distribution is normal, we use the z-score formula.

In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the zscore of a measure X is given by:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

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 pvalue, we get the probability that the value of the measure is greater than X.

In this question, we have that:

[tex]\mu = 9, \sigma = 2.5[/tex]

What percentage of the books last more than 10 years?

As a proportion, this is 1 subtracted by the pvalue of Z when X = 10. So

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{10 - 9}{2.5}[/tex]

[tex]Z = 0.4[/tex]

[tex]Z = 0.4[/tex] has a pvalue of 0.655

1 - 0.655 = 0.345

So

34.5% of the books last more than 10 years.

The formula in finding the distance between two points is given below:

Now, you know the distance formula. So, let us try solving the given problem using the distance formula.

Problem: What is the distance between A(-3, -4) and B(4, 5)?

From inspection on the given problem:

Substitute the given values into the distance formula and solve for AB:

Therefore, the distance between two points is [tex]\sqrt{130}[/tex] or 11.4 units.

[tex]\\[/tex]

Now, wasn't that easy? Try this sample problem:

From the sample problem above, you may solve it on your own to enhance your skill on calculating the distance.

For more information about the Distance Formula, just visit this link: https://brainly.com/question/18156437

Answer:

5/12

Step-by-step explanation:

If you roll it twice there are 12 options. The odd numbers are 1, 3, and 5. Add 2 and 4, and that's a 5/12 chance.

Answer:

Step-by-step explanation:

1. As you can see in the picture, x is 116 degrees, because that angle and the angle labeled 116 degrees are corresponding, meaning that their angles are the same.  

2. As you can also see in the picture, y+11+x = 180 deg, because they are two angles that make a straight angle. We know that x is 116 deg, so we can solve y with an equation:

y + 11 + 116 = 180

y + 127 = 180

y = 180 - 127

y = 53 degrees.

Hope this helped! Don't forget to mark it Brainliest!

Answer:

y=n-0.26n

Step-by-step explanation:

July (y) = June (n) - 0.26(June)

Answer:

y = -1

Step-by-step explanation:

The two lines around x is the absolute value symbol. Absolute value is how far away a number is from 0 on a number line. -10 is 10 points away from 0, so it is now 10.

y = 10 - 11

y = -1

Answer: Frank has a 4 out 15 chance of winning and 9 out 15 chance of losing

Step-by-step explanation:

Answer:

Really,

18 students and that is because

72/100 * 25

=> 72/4 = 18

Answer:

Step-by-step explanation:

d

What's the rest?You only said, From 180 books to 150 books sooo you gotta put the rest or nobody will answer it.

Answer:

Step-by-step explanation:

This question is incomplete; here is the complete question.

A weather station on the top of a mountain reports that the temperature is currently 0°C and has been falling at a constant rate of 3°C per hour. Find each temperature. Explain or show your reasoning.

If it continues to fall at this rate, what will the temperature be:

In 2 hours ............. In 5 hours .............. In half an hour......................

If the current temperature of the mountain is b°C and it is falling at a constant rate of 3°C per hour.

Then after 'x' hours, temperature on the top of the mountain will be represented by the function,

T(x) = 0 - 3x

Therefore, temperature after 2 hours = -3(2) = -6°C

Temperature after 5 hours = -3(5) = -15°C

Temperature after half an hour = [tex]-3(\frac{1}{2})[/tex]

                                                    = -1.5°C

Answer:

13 and 7

Step-by-step explanation:

13 - 7 = 6

13 + 7 = 20

hope this helps...

Answer:

470 cm

Step-by-step explanation:

4.7 x 100 = 470

Answer:

[tex] m\widehat {EF} = 146\degree [/tex]

Step-by-step explanation:

Measure of an arc is equal to the measure of its corresponding central angle.

Here, measure of the corresponding central angle of the arc EF is 146°

Therefore,

[tex]m\widehat {EF} = 146\degree [/tex]

Answer:

8 cups eqaul 2 quarts

Step-by-step explanation:

Maybe offer to make a deal with them where if you get all A's in your normal classes you can quit. It really depends on why you're taking the class in the first place. If it's not affecting your grades in any way, maybe it's best to just stay for the benefits of it.

Answer:

w=82

Step-by-step explanation:

7=w5

Answer:

The value of w is -166.

Step-by-step explanation:

☆Let's solve the equation

[tex] \: \: \: \: 7 - w = 173 \\ \frac{ - 7 \: \: \: \: = - 7}{-1w = 166} [/tex]

Answer:

29/3

Step-by-step explanation:

Multiply and simplify

58/6=29/3

Answer:

29x/3

Step-by-step explanation:

i used math website trust me its right

Answer:

27/23

Step-by-step explanation:

Answer:

7/16π

Step-by-step explanation:

The surface area of the snow ball = 4πr^2

Let the surface area= y

Then y= 4πr^2

The derivative can be taken with respect to time as

dy/dt= (8πr)dr/dt...........eqn(1)

We were told that its surface area decreases at a rate of 7 cm2/min.

Then dy/dt=-7

diameter = 8 cm. cm/min, the radius r= 4cm/min

r= 4

Substitute the values of r into eqn(1)

dy/dt=(8π×4)dr/dt

-7=(32π) dr/dr

dr/dt= -7/32π................eqn(**)

But we know that diameter d= 2× radius

d=2r............eqn(*)

We can find the derivatives with respect to t as

dd/dt=2dr/dt

Then substitute en(**) we have

dd/dt=2(7/32π)

dd/dt= -14/32π

Divide both numerator and denominator by 2

dd/dt= -7/16π

Hence, the diameter decreases by the rate of 7/16π

Answer:

1 : 3

Step-by-step explanation:

Given :

Number of Carnation = 7

Number of Daffodils = 21

The number of carnation to daffodilswxoreaaed as a simplified ratio ;

Number of carnations : Number of Daffodils

7 : 21

7 / 21

1 / 3

Answer:

-4 is the correct ans

hope it helps

Step-by-step explanation:

[tex] \tt{6 = 2 - k}[/tex]

~Swap the sides of the equation

⟶ [tex] \tt{2 - k = 6}[/tex]

~Transpose 2 to right hand side and change it's sign

⟶ [tex] \sf{ - k = 6 - 2}[/tex]

~Subtract 2 from 6

⟶ [tex] \tt{ - k = 4} [/tex]

~Divide both sides of the equation by -1

⟶ [tex] \tt{ \frac{ - k}{ - 1} = \frac{4}{ - 1}} [/tex]

⟶ [tex] \tt{k = - 4}[/tex]

[tex] \pink{ \boxed{ \boxed{ \tt{Our \: final \: answer : \boxed{ \underline{ \tt{k = - 4}}}}}}}[/tex]

Hope I helped ! ♡

Have a wonderful day / night ! ツ

▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁

Answer:

0.13

Step-by-step explanation:

Answer:

13

Step-by-step explanation:

Answer:

x =√-1.403 = 0.0 - 1.18454 i

x =√-1.403 = 0.0 + 1.18454 i

x =√11.403 = -3.37685

x =√11.403 = 3.37685

Step-by-step explanation: i think either one of these could work

hope i could help :)

Answer:

C)6/15

Step-by-step explanation:

it reduces to 2/5 no 1/3

12/36 --> 1/3

Answer:

1

Step-by-step explanation:

The algebraic expression is

(x²+ 7x+10/ x²+ 4x+4 ) (x²+ 3x+2/x²+ 6x+5)

The options are                                               Arrangement

a.(x+5/x+2) * ( x+2/x+5)                                             Number 2

b.(x+7/x+4) ( x+1/x+2)

c.    1                                                                            Number 4

d.   (x+5) ( x+2) /(x+5)

e.  (x+7) (x+1)/(x+4) ( x+1) * (x+3) (x+1)/(x+3) (x+2)

f. (x+2) (x+5)/(x+2) ( x+2) * (x+1) (x+2)/(x+5) ( x+1)       Number 1

g. x+2

h.(x+5/x+2) ( x+2/x+5)                                               Number 3

Answer

Factorizing the expressions (x²+ 7x+10/ x²+ 4x+4 ) (x²+ 3x+2/x²+ 6x+5)

=(x²+ 5x+2x+ 10/ x²+ 2x+2x+4 ) (x²+ 2x+x+ 2/x²+ 5x+x+5)

Taking common

=[x(x+5) +2(x+5)/ x(x+2) +2(x+2) ] [ x(x+2) +1(x+2)/ x((x+5) +1(x+5)]

Putting commons together

=[(x+2) (x+5)/ (x+2) (x+2)] [ (x+2)(x+1)/ (x+1) (x+5)]

Cancelling

= [ (x+5)/ (x+2)]* [ (x+2)/  (x+5)]

=[ (x+5)/ (x+2)] [ (x+2)/  (x+5)]

Again Cancelling

=1

The above question is solved in 4 steps :

Step 1

(x+2) (x+5)/(x+2) ( x+2) * (x+1) (x+2)/(x+5) ( x+1)

Step 2

(x+5/x+2) * ( x+2/x+5)

Step 3

(x+5/x+2)  ( x+2/x+5)

Step 4

1   which is the answer .

The steps

(x+7) (x+1)/(x+4) ( x+1) * (x+3) (x+1)/(x+3) (x+2) ,

(x+5) ( x+2) /(x+5),  

(x+7/x+4) ( x+1/x+2) and (x+2) are not related to this question.

Answer:

D = 90°

Step-by-step explanation:

the square on the angle means its a right angle and right angle is always 90°