Someone please me thank you

Answer:

A)CI 90 % = [ 7,2103 ;  8,7297]

B) s = √ ∑(xi - xp)²/n-1

c) z is the score for the given significance level in this case is 1,64

Step-by-step explanation:

For a confidence Interval of 90%, the significance level is α = 10 %

α = 0,1     α/2 = 0,05  and from z-table we find  z(c) for 0,05   z(c) = 1,64

CI 90 % = [ x  ±  z(c) * s/√n ]

CI 90 % = [ 7,97 ±  1,64 * 2.62/√32]

CI 90 % = [ 7,97 ± 0,7597]

CI 90 % = [ 7,2103 ;  8,7297]

B) To calculate the standard deviation of the sample the equation is:

s = √ ∑(xi - xp)²/n-1

xi - xp  is the difference between each one of the elements of the sample

xp is the mean or average of the elements of the sample and n is the sample size

Answer:

Step-by-step explanation:

155 divide by 31=5

Answer:

1/5 or 0.2.

Step-by-step explanation:

31 / 155

Now 155/31 = 5

so the answer is 1/5.

Answer:

We are learning this in 7th grade lol how did you get 7th grade math to 6th grade math

Answer:

Step-by-step explanation:

two like therms have the same literal part

3x^4 and 6x^4

6x and -8x

-8 and 3

Answer:

3x^4 ↔ 6x^4

6x ↔ -8x

-8 ↔ 3

Step-by-step explanation: i took the test !

Answer:

y = 5

x = 5

Step-by-step explanation:

find the complete question in the attached image

the angle opposite 5y is also 5y. this is because alternate angles are equal

180 = 155 + 5y

5y = 180 - 155

5y = 25

y = 5

the sum of 5y and 13x is equal to 90

this is because the sum of angle on a straight line is equal to 180 and one of the angle on the straight line is already equal to 90 . so, 90 (180 - 90)

5y + 13x = 90

25 + 13x = 90

13x = 90 - 25

13x = 65

x = 5

Circumference of a circle is pi x diameter

Circumference = 3.14 x 8 = 25.12 feet.

Arc AB is 45 degrees.

Arc length = circumference x angle/360

Arc length = 25.12 x 45/360 = 3.14 feet

Answer: 3.14 feet

Answer:

length = 2w - 3

l = length

w = width

2(length) + 2(width) = perimeter

2(2w - 3) + 2(w) = 60

6w -6 =60

w = 11

len = 2(11) - 3

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

Answer:

Hey! I just took the test and the correct answer is option B.

Step-by-step explanation:

Answer:

200 meters

Step-by-step explanation:

a² + b² = c²

c² = 120² + 160²

c² = 14,400 + 25,600

c² = 40,000

√(c²) = √(40,000)

c = 200

Answer: 200 meters

Answer:

I believe the answer is b.73.7

Answer:

73.7

Step-by-step explanation:

Answer:

58 units squared

Step-by-step explanation:

**I'm doing the question with the 7 by 3 triangle in the picture, not 777 by 333**

Pythagorean Theorem: [tex]a^2+b^2=c^2[/tex], where c is the length of the hypotenuse.

The given sides are legs, therefore, [tex]3^2+7^2=c^2[/tex]

[tex]9+49=c^2; 58=c^2; c=\sqrt{58}[/tex]

c is also one of the sides of the square. A square's area is one of the sides' lengths squared, so:

[tex](\sqrt{58}) ^{2}=58[/tex]

Answer:
58

Step-by-step explanation:

We can use the Pythagorean theorem to find the area of the square for the third side.

The equation for the Pythagorean theorem is

a^2 + b^2 = c^2

where a and b are the lengths of the two legs of the triangle, and c is the length of the hypotenuse.

a^2 + b^2 = c^2

3^2+7^2=x^2

9+49=x^2

58=x^2

The area of the square for the third side of the triangle is 58 units^2 squared.

Answer:

You can have a D in your class to pass but if you have a F then you dont pass the class

Step-by-step explanation:

Answer:

(B). 1240 cm²

Step-by-step explanation:

Answer:

6/3

8/4

we can keep 6/8 also but we can't keep 3/8

Answer: you forgot to add the picture

Step-by-step explanation:

But if you think you are correct, go for it

Answer:

$129.00 is the correct answer

Step-by-step explanation:

..

Answer:

g(f(4)) = 41

Step-by-step explanation:

Evaluate f(4) then substitute the value obtained into g(x)

f(4) = 4² + 4 = 16 + 4 = 20, then

g(20) = 2(20) + 1 = 40 + 1 = 41

That is g(f(4)) = 41

Answer:

Easiest: Translation

Most difficult: rotation

Step-by-step explanation:

- Translation involves just moving of an image without any changes anything about it from size to orientation to shape. Therefore, the translated image is exactly the same as the original one just that it is moved to a different place.

- Rotation involves rotating the image by a certain angle.

For example, we can rotate an image by 30°, 45°, 60° e.t.c.

- Reflection is simply the mirror image of an existing image which is basically flipping the original image along a vertical or horizontal line which acts like a mirror.

Looking at these definitions, the easiest will be translation because we are not changing any single thing but just moving from one place to another while the most difficult would be rotation because it involves rotating at an angle which one may not easily get correctly.

It needs to be 2s if you look at the graph it should show

Answer:

2 seconds

Step-by-step explanation:

Answer:

The height of the ball after 3 secs of dropping is 16 feet. Function h(t)=160-16t^2

have a good day :)

Answer:

B) 1.15x, adding 15% to the cost of haircut is same as to multiply cost by 1.15

Step-by-step explanation:

Given expression = x + 15% of x

x + (15/100) x = x + 0.15x

= (1+ 0.15) x = 1.15x

15% = 0.15 , added to x = 1.15x

Answer:

4) y=-4x

Step-by-step explanation:

The lines goes down 4 units as it moves 1 unit right.

Answer:

a[tex]\geq[/tex]16

Step-by-step explanation:

3+a[tex]\geq[/tex]19

-3    -3

a[tex]\geq[/tex]16

(see below) (The line I drew represents where a is and if it is to be greater or equal to it must be 16 or over)

Answer:

1.65$

Step-by-step explanation:

18.20$ (total price) - 4×1.25$ ( chips price) = 13.2$

13.2$ ( price of 8 hot dog)

price of one hot dog= 13.2$ ÷8= 1.65$