Math question pls help

Answer:

D.2

Step-by-step explanation:

The z-score of an appliance that stopped working at 64 months is 2

Standard score or z score in statistics is defined as the number of standard deviations by which that the value of a score is above or below the mean value.

The formula to find the z score of a data is,

z = (x - μ) / σ

Here x is the observed value, μ is the mean and σ is the standard deviation.

Given that,

Mean = 48 months

Standard deviation = 8 months

x = 64 months

Substituting in the formula,

z = (64 - 48) / 8 = 2

Hence the z score of the appliance is 2.

Learn more about Z Score here :

https://brainly.com/question/15016913

#SPJ3

Answer:

Perpendicular

Step-by-step explanation:

Answer:

-8.71428571

Step-by-step explanation:

Calculator gl

Answer:

(i)

Step-by-step explanation:

Given that the mean value of the distribution is 1.1, then we can safely assume that the peak value will be reside around one with a variability measure, standard (1.5) represents changes in distribution away from the mean value. The could be to either side of the distribution. However, the cannot be a negative value for the number of courses taken, hence, the maximum value we can have to the left is 0. (figures to the far left of the distribution are negative). This means that the curve will fall towards the right, (positive direction hence giving a right skewed distribution.

Answer:

457.9

Step-by-step explanation:

Answer:

4(x-5)= 4x-20

so the equivalent equation is 4(x-5)

Answer:

I don't actually know sorry

Step-by-step explanation:

I don't know

Answer:

Boys: 2/17

Girls: 4/17

Step-by-step explanation:

2 + 15 = 17 (to get the total number of boys in Sapphire's class)

4 + 13 = 17 (to get the total number of girls in the class)

The proportion is how many who are left handed over the total number of girls/boys. ^^

So, left-handed for boys = 2, which makes the proportion 2/17

And there are 4 left-handed girls, so the proportion is 4/17

Step-by-step explanation:

To solve the problem [tex]-\frac{3}{4} (-8a-12)[/tex]

we first use the distributive property, which means to multiply everything on the inside with the outside number on the left.

so [tex]-\frac{3}{4} * -8a, -\frac{3}{4} *-12[/tex]

This would equal

[tex]6a+9[/tex]

its pretty simple.

what may be confusing is the fraciton multiplication

to solve this we convert the -8 and -12 into a fraction. This would be

[tex]-\frac{8}{1} and-\frac{12}{1}[/tex]

and multiplying fractions is easy, u just do it straight across.

so 3 times 8 is 24 so this would be 24/4

and 24/4 simplified is 6

and 3 times 12 is 36

so it would be 36/4

this would equal 9 simplified

and since we are just multiplying all negative numbers here they all turn out to be positive numbers because you should know.  a negative times a negative equals a positive.

Answer:

m<A=97

m<B=97

Step-by-step explanation:

m<A=m<B

Congruent angles and they are vertical angles. The other two are also the same because the angles given have the same degrees.

m<A is supplementary to 83 degrees

Supplementary angles are two angles that sum up to 180 degrees.

180-83=97

97 degrees is the answer for each missing angles.

Answer:

y=15

Step-by-step explanation:

y=21 - 6

y = 15

hope this helped!

Answer:

B

Step-by-step explanation:

I plugged it into a graphing calculator but if you use "rise over run" you'll get your answer without a phone

Answer:

The mean of Trail Middle School wrestling team is greater by 20 pounds as compared to that of Burlington Middle School  wrestling team

Step-by-step explanation:

Since the value of absolute deviation in case of Trail Middle School wrestling team and Burlington Middle School  wrestling team is same. Hence, there will be no impact of it while determining the difference in mean deviation of both the team.

Thus, the difference in mean deviation is [tex]150-130 = 20[/tex]

The mean of Trail Middle School wrestling team is greater by 20 pounds as compared to that of Burlington Middle School  wrestling team

Answer:

x=6

Step-by-step explanation:

30=6+4x

you have to combine the number that are the same, like 2 and 4 or 3x and 4x

30-6=4x (you should always remember when you move a number if it was - it will turn +)

30-6=4x

24=4x

x=24/4

x=6

Answer: either I don't understand the question or its 72% and I'm fairly certain its 72%

Answer:

B

Step-by-step explanation:

step 1 - rationalize the denominator to get:

[tex]\sqrt{35x^5}[/tex] ÷ [tex]\sqrt{7x^3}[/tex]  =  ([tex]\sqrt{245}[/tex] ·x^5/2·x^3/2) ÷ 7x³

= ([tex]\sqrt{5}[/tex][tex]\sqrt{7}[/tex][tex]\sqrt{7}[/tex]·x^4) ÷ 7x³

= 7[tex]\sqrt{5}[/tex]·x^4 ÷ 7x³

= [tex]\sqrt{5}[/tex]x

Answer:

18/5

Step-by-step explanation:

12+17+20+8+13 =70

70/5 = 14 which is the mean

the distances from the mean are

2 3 6 6 1

add them which is 18 then divide by 5 to find the mean

18/5

Answer:

3.43%

Step-by-step explanation:

362-350=12

12:350*100 =

(12*100):350 =

1200:350 = 3.43

Answer:

9

Step-by-step explanation:

radius is half of the diameter

Answer:

false

Step-by-step explanation:

False

5(9)(3.2)

45*3.2=144

Hope this helps :)

Answer:

bit.^{}

ly/3a8Nt8n

Step-by-step explanation:

here is the link to the answer

Answer:

542

Step-by-step explanation:

I believe it is 542, because 596 and 54  are the only numbers available in this equation, so you would subtract 54 from 596

596-54=542

Answer:

x=4-√79, x=4+√79

Step-by-step explanation:

Answer:

you should get math w ay it's good

Answer:

area = 78.46

Step-by-step explanation:

31.4 = 2pi * r

divide 31.4 by 2 and get 15.7

15.7 = pi * r

divide 15.7 by pi and get

4.997 = r

(4.997^2) * pi = 78.46

Answer:

I agree with you. that is what I got too

Answer:

4%

Step-by-step explanation:

Given data

The total sales= $8900

Donated amount=$356

Hence the percent donated is

=Donated amount/Total Sales *100

= 356/8900*100

=0.04*100

=4%

Hence the donated percent is 4%

Answer:

1. m<a and m<h, m<e and m<d

2.m<a and m<c, m<b and m<d, m<e and m<g, m<f and m<h

3. m<a= 112

m<c=112

m<f=112

m<h=112

m<b=68

m<d=68

m<e=68

m<g=68

área del parque

A=Pi . R^2

A=Pi (700m^2)

A=3.1416 x 490000m^2

A= 1539380.4 m ^2

área de la fuente

a= Pi. r^2

a=Pi (5cm^2)

a=3.1416 x 25cm^2

a= 78.54 cm^2

Luego lo que hacemos que al area grande le restamos la pequeña.

pero antes que nada convertiremos los metros a centimetros.

A= 1539380.4 m^2

1539380.4 m^2 (100cm/1m)

eliminaras los metros y te quedara asi

1539380.4  ( 100 cm/ 1)

153,938,040 cm^2

luego restamos A-a

153,938,040 cm^2 -  78.54cm^2

R/ el area de la zona de paseo es de 153937961.5 cm^2 !!