Plz, give me an answer thanks :)

Answer:

Keenan's z-score was of 0.61.

Rachel's z-score was of 0.81.

Step-by-step explanation:

Z-score:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score 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 p-value, we get the probability that the value of the measure is greater than X.

Keenan scored 80 points on an exam that had a mean score of 77 points and a standard deviation of 4.9 points.

This means that [tex]X = 80, \mu = 77, \sigma = 4.9[/tex]

So

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

[tex]Z = \frac{80 - 77}{4.9}[/tex]

[tex]Z = 0.61[/tex]

Keenan's z-score was of 0.61.

Rachel scored 78 points on an exam that had a mean score of 75 points and a standard deviation of 3.7 points.

This means that [tex]X = 78, \mu = 75, \sigma = 3.7[/tex]. So

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

[tex]Z = \frac{75 - 78}{3.7}[/tex]

[tex]Z = 0.81[/tex]

Rachel's z-score was of 0.81.

Answer:

4%

Step-by-step explanation:

1/25 is equal to 0.04

To convert a decimal to a percent... move the decimal 2 spots to the right

This will give you 4%

Hope this helps!

HOW TO CONVERT 1/25 TO A PERCENTAGE?

To write 1/25 to a percentage, you must remember that 1 equals 100% and that what you must do is multiply the number by 100 and add the symbol% at the end.

[tex] \bold{1 /25 * 100 = 0.04 * 100 = 4\%}[/tex]

And finally we have:

[tex] \bold{1/25 \: a \: percentage equals 4\%}[/tex]

Answer:

a nonlinear function I think because it's a quadratic one?? kinda

Answer:

7

Step-by-step explanation:

Uhh 7 divided by 1 is 7?

Answer:

7

Step-by-step explanation:

There are 7 gallons in a 7-gallon container of milk.

Answer:

160 ft, 250ft

Step-by-step explanation:

Rectangular base:

Width = w

length =2w - 70

Perimeter = 820 ft

2*(length + width) = 820

2*(2w - 70 + w ) = 820

2 *(2w + w - 70) = 820     {Combine like terms}

2* (3w - 70) = 820

3w*2 - 70*2 = 820

6w - 140  = 820    

6w  = 820 + 140     {Add 140 to both side}

6w = 960     {Divide both sides by 6}

w = 960/6

w = 160 ft

length = 2*160 - 70

          = 320 - 70

          = 250 ft

Answer:

-6.075

Step-by-step explanation:

simple addition/subtraction

we multiply all the terms by "-1"

we add the first three terms then subtract the last from it

Answer:

No solution

Step-by-step explanation:

Answer:

[tex]x^2 + (y-60)^2 = 30,625[/tex]

Step-by-step explanation:

There are 42 carts, so there is 42 spaces in between them; if one of those spaces are 25pi/3 feet long, then 42 of them would be 25*42*pi/3 = 350pi (Perfect! no fractions)

350pi is the circumference. Now if we plug that into the circumference equation we get:

C = 2pi*r

350pi = 2pi*r

Divide both sides by pi to get rid of it

350 = 2r

Divide both sides by 2

r = 175 feet

So the new equation to graph it is:

x^2+y^2 = 175^2 = 30,625

We also know that the center of the Ferris wheel has to be at least 60 feet from the ground. Since the radius is more than that, a good bit of the Ferris wheel has to be underground OR we can make it higher (keyword: at least) if we want it to be above ground. I'll do the equation for underground since it more closely represents the question.

subtracting a number from y, shifts the graph up that much so:

[tex]x^2 + (y-60)^2 = 30,625[/tex]

I can't really draw it electronically but I can graph it:

Answer:

angle a+angle b+angle c=180°

90°+38°+angle c=180°

128°+angle c=180°

angle c=180°-128°

angle c =52°

52°+n°=180°

n=180°-52

n=128°

Answer:

350 tickets

Step-by-step explanation:

if you do 42/350, it would equal 12%, so 350 is the total

Answer:

  (b)  (x, y) ⇒ (-x, y); (x, y) ⇒ (x + 1, y + 1)

Step-by-step explanation:

A graph shows the image is consistent with reflection over the y-axis

  (x, y) ⇒ (-x, y)

and translation right 1, up 1

  (x, y) ⇒ (x +1, y +1)

These transformations are listed in the second choice.

__

In the attachment, the original image is blue, the reflected image is purple, and the final translated image is red.

Answer:

30

Step-by-step explanation:

300/4=75

75/5=15

15*2=30

Answer:

area = 117 cm²

Step-by-step explanation:

area = 1/2(b1 + b2)h

area = 1/2(17 + 9)(9)

area = 117 cm²

Answer:

A=117

Step-by-step explanation:

:))

Answer:

the anser is 88 i think

Step-by-step explanation:

beacuse 5.8=40

              5.8=40

               1.8=8

or it could be

264

Step-by-step explanation:

Figure on the left: 5x5x8 = 200

Figure on the right: 8x1x8 = 64

200+64=264

Answer:

264

Step-by-step explanation:

Figure on the left: 5x5x8 = 200

Figure on the right: 8x1x8 = 64

200+64=264

Answer: 14 feet 4 inches

Step-by-step explanation:

Given: The length of the first table = 7 feet 7 inches

The length of the second table = 6 feet 9 inches

The total length of two tables = 7 feet 7 inches + 6 feet 9 inches

= (7+6) feet (7+9) inches

=13 feet 16 inches

Since 1 feet = 12 inches

The total length of two tables = 13 feet+ (12 inches +4 inches)

=13 feet +( 1 feet +4 inches)

= 14 feet 4 inches

Hence, the total length of the two tables =  14 feet 4 inches

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Answer:

20 questions

Step-by-step explanation:

20 · 0.55 = 11

Answer:

hi

Step-by-step explanation:

i think so...

[tex]\pi \times {r}^{2} \times \frac{h}{3} \\ 3.14 \times 3.5 \times \frac{9}{3} \\ = 32.97[/tex]

hope it helps

bye

Answer:

1 1/14

you have to multiply by the reciprocal of the second fraction

Answer:

there's nothing there

Step-by-step explanation:

The solution is, The length of line segment AB is 3.4cm.

Line segment is the part of line which have two endpoint and bounded by two distinct end points and it contain every point on the line which is between its endpoint.

here, we have,

The area of octagon is given as 2a^2(1+sqrt{2})

Where a is the side of octagaon.

All lengths of sides of octagon are same.

now, we get,

As, 2a^2(1+sqrt{2}) = 54cm

so, we have,

Then, a^2 = 54/2(1+sqrt{2})

a^2 = 54/4.828

a^2 = 11.19

a = 3.4 cm

Hence, The solution is, The length of line segment AB is 3.4cm.

Learn more about the line segment visit:

brainly.com/question/280216

#SPJ2

complete question;

What is the length of line segment AB, rounded to the

nearest tenth?

3.4 cm

O 4.8 cm

24 cm

0 27 cm

Answer:

Step-by-step explanation:

21 : 14

Both have 7 in common

3 : 2

So Option C 21 : 14 is the correct answer

Answer: 166.29

Step-by-step explanation:

Answer:

It's 166.29

Diane score 166.29 more than jeff

Step-by-step explanation:

 356.789

- 190.499  

= 166.29

1500(1+0.04)^3 = 1687.30

1687.30(1+0.05) = 1771.67 to the nearest pound: 1772

Answer:

1) x+y=50

2) 5x+2y=200

3)2x+4y=200

Hope this helps!

Answer:

x+3=8, 2x-8=2, and 4x-4=16

Step-by-step explanation:

The correct answer is A: -2 + 2 = 0

Answer:

where is the picture???????????

Answer:

The slope is [tex]\frac{5}{4}[/tex]

Step-by-step explanation:

Slope of a dataset:

The slope of a dataset, having two points, is given by the change in y values divided by the change in x values

In this question:

Two points:

x = 0, y = 8

X = 4, y = 13

The slope is:

[tex]m = \frac{13 - 8}{4 - 0} = \frac{5}{4}[/tex]

The slope is [tex]\frac{5}{4}[/tex]