Mathematics College

I need help asap
I will need help finding a and b

I Need Help AsapI Will Need Help Finding A And B

Answers

Answer 1

Answer:

(a) [tex]s = 2.56[/tex]

(b) [tex]s = 1.71[/tex]

Step-by-step explanation:

Given

Tables (a) and (b)

Required

Determine the standard deviation

For (a):

[tex]\bar x = 11.5[/tex] --- mean

The standard deviation is calculated as:

[tex]s = \sqrt{\sum np(1-p)}[/tex]

This gives:

[tex]s = \sqrt{5*0.1*(1-0.1) +10 * 0.5 * (1 - 0.5) + 15 *0.4*(1-0.4) }[/tex]

[tex]s = \sqrt{5*0.1*0.9 +10 * 0.5 * 0.5 + 15 *0.4*0.6 }[/tex]

[tex]s = \sqrt{6.55}[/tex]

[tex]s = 2.56[/tex]

For (b):

[tex]\bar x = 4.4[/tex] --- mean

The standard deviation is calculated as:

[tex]s = \sqrt{\sum np(1-p)}[/tex]

This gives:

[tex]s = \sqrt{1*0.2*(1-0.2) +3 * 0.3 * (1 - 0.3) + 5 *0.1*(1-0.1) + 7*0.4*(1-0.4)}[/tex]

[tex]s = \sqrt{1*0.2*0.8 +3 * 0.3 * 0.7 + 5 *0.1*0.9 + 7*0.4*0.6}[/tex]

[tex]s = \sqrt{2.92}[/tex]

[tex]s = 1.71[/tex]

Related Questions

Ulani is constructing a triangle that has sides measuring 12 cm and 28 cm. Which measurements could be the length of the third side? Select two options.
15 cm
24 cm
38 cm
41 cm
53 cm

Answers

The answer is 24 cm and 38 cm

Answer:

B and C

Step-by-step explanation:

Find the Area: 13 in | 4 in 7 in 24 in​

Answers

Answer:

242 inches²

Step-by-step explanation:

area = (1/2) · (p + q) · h (trapezoid formula)

(1/2)(13+24)(4)= 74

area= bh (rectangle)

(24)(7)= 168

168+74= 242

PLEASE HELP ME! DUE VERY SOON AND I GIVE BRAINLIEST IF U ANSWER!

Write a fraction in which the numerator and denominator are both greater than 9.

btw im pretty sure that it has to be an improper fraction since it’s over 9 and 9 is a whole number.

Answers

Answer:

Step-by-step explanation:

It does not need to be an improper fraction.

For example, the numerator and denominator of 10/11 are both greater than 9, but 10/11 is not an improper fraction.

Answer:

Remember that a number divided by itself is 1. That means if the numerator and denominator are the same, the fraction is equal to 1. So all of the following are equal to 1: 2/2, 3/3, 4/4, and so on and so forth. so a good one you could do is 9/9

Step-by-step explanation:

the coast of 16 pens is rupees 256. Find the cost of 13 pens.​

Answers

256 divided by 16=16 each pencil
So, 16x13=208
Answer: 208

Find the midpoint of the line segment with the endpoints (-6,-8) and (-2,-6)

Answers

Answer:

Step-by-step explanation:

The midpoint between two points is just the average of the coordinates.

mp=((x2+x1)/2, (y2+y1)/2)

mp=((-6-2)/2, (-8-6)/2)

mp=(-4, -7)


25 + 62 x 0.25
Evaluate the expression

Answers

Answer:

40.5

Step-by-step explanation:

25 + 62 x 0.25 =

25 + 15.5 =

40.5

25+62 × 0.25 = 40.5

62 × 0.25= 15.5

25 + 15.5 = 40.5

State weather ABC and AED are congruent. Justify your answer

Answers

I had to do this as well, tbh I wasn’t that good though..
I think the answer is c. I hope this helps. Be safe out there!

1st Question:
Solve: 3/x-4>0

X<4
X>-4
X>4
X<-4

2nd Question:
Solve x+2/x-4<0

-4 -2 -2 -4

Answers

Answer:

1) 3/4 = x

Step-by-step explanation:

1) 3/x -4 >0

=3/x -4+4>0 +4

=3/x> 4

switch 4 with x

x = 3/4

so literally the ans is x< 4

sorry but I don't know how to do the second question ☹️☹️

Answer:

first Question answer is x > 4.         The second question answer is –2 < x < 4

Step-by-step explanation:

EDGE 2021

Sapna and Robbie have some biscuits.
Altogether they have 14 biscuits.
Sapna has 2 more biscuits than Robbie.
How many biscuits do Sapna and Robbie each have?

Answers

Socratic < it’ll have the answer fs

Complete the missing parts of the table for the following function. y = 6 x -2 -1 0 1 0 1 2 3 1 y [ ] 6 36 36 1?​

Answers

Answer:

Under -1 it will be 1/6

Under zero it would be 1

under 3 it would be 216

Explanation:

y = 6 to the power of x

what is 2604 divided by 5

Answers

Answer:

150.80

Step-by-step explanation:

Answer:520.8

Step-by-step explanation:

What is 730 divided by 30

Answers

Answer:

24 1/3

Step-by-step explanation:

long division

A bag contains 10 marbles: 2 are green, 4 are red, and 4 are blue. Tammy chooses a marble at random, and without putting it back, chooses another one at random. What is the probability that both marbles she chooses are blue?

Answers

There are 10 marbles, out of these 10 there are 4.

The probability of her picking a blue marble is 4/10

This can be simplified to 2/5

The ratio of boys to girls In student council is 4 to 5. Students council has 18 members. How many are boys?

Answers

Answer:

Step-by-step explanation:

boy count is 1476

Explanation:

There is an important difference between the way counts are viewed in ratio to that in fractions.

The ratio of boys : girls

→

4

:

5

so you have 4 boys and 5 girls making the whole count

4

+

5

=

9

in its simplest form.

So to change the ratio proportion into fraction proportion we have:

boys

→

4

9

of the whole.

girls

→

5

9

of the whole.

It is given that the whole is 3321 therefore the count of boys is:

4

9

×

3321

=

1476

Discriminant sorting

Answers

Answer: Discriminant sorting activity: Work with two other people, and find the discriminant of the quadratic equations you are given (each person should do 2). Sort them into 3 groups, and be prepared to explain how you chose your groups.

Step-by-step explanation:

helen spent $7.75 to purchase 23 snacks for the club meeting. chips are

Answers

I just looked up the question Bc I didn’t know if there was more to it but, Helen bought 15 chips and 8 pretzels. I hope this helps!!

Find the area of the triangle.
4ft
ift
8ft
[? ] ft2

Answers

there is no triangle attached

The Venn diagram below represents the students in a particular high school.
How many female students have a part-time job and a driver's license?
Female
Part-time job
74
111
56
45
92
38
137
89
Driver's license
No

Answers

Answer:

C. 45

Step-by-step explanation:

Since the question is asking how many females have both a driver's license and a part-time job. So you need to find the number that reoresents all three of these categories. This category is  shown in the very center with the number 45.

Hope it helps!

Answer:

C. 45

Step-by-step explanation:

Because its inside all three circles that you want.

write these ratio in its simplest form 200:180​

Answers

Answer:

10:9

Step-by-step explanation:

Please help, this is due soon

Answers

Answer:

4

Step-by-step explanation:

If I remember correctly you can not have the arrows on the same y axis

y=ax with a>1

im very confused on what to do

Answers

Answer:

Step-by-step explanation:

‘a’ in this question is the slope of the line. Slope is (y2-y1)/(x2-x1) for any two points. We can see the line intersects the point (0,0) and (-10/9) so the slope is -10/9 which is less than -1 so

a<-1

express 729 as a power of 27

Answers

27 to the 2nd power
so uh
27^2

If the 13th term in a linear sequence is 92 and the 28th term in the sequence is 152, what is the 6th term in the sequence?

Answers

Answer:

ueolrkkrirllelelkrururklñeñrllkrkkrlrllrllrlrlki

The floor in the room is 4.5m long and 3.1m wide. Calculate the area of the floor​

Answers

Answer:

13.95 metre square

Step-by-step explanation:

The measurements you gave are different. Hence it concludes that the floor is rectangular in shape.

Sooo,

Area of rectangle = length x breadth

= 4.5×3.1 = 13.95 m^2

Hope it helped!!!

3y - 8 = -3(4 - 2x)
Step 2 of 2: Find the equation of the line which passes through the point (- 12. -3) and is parallel to the given line Express
your answer in slope-intercept form. Simplify your answer.

Answers

Answer:

y=2x+21

Step-by-step explanation:

Look at attached pictures for further explanation

HELP!!! What are the quotient and remainder when x^3 + 9x^2 + 21x + 24 is divided by x + 2? PLEASE HELP

Answers

Answer:

A) The quotient is x^2+7x+7 and the remainder is 10.

Step-by-step explanation:

Set up the synthetic division using the coefficients of the numerator and the root in the denominator. Divide using the rules for synthetic division.

In tug of war, when one team moves toward the other, what can be said about the forces?

Answers

Answer:

When the force exerted by one team slackens, the force exerted by their third law, each team pulls the opposite team with equal force in a tug of war.  So the two forces don't balance each other and the rope accelerates towards the stronger team.

Step-by-step explanation:

Dhanu has a model railway.
(a) He has a train that consists of locomotive and 4 coaches. The mass of the locomotive is 87 g
and the mass of each coach is 52 g.
i) Work out the total mass of the train.​

Answers

Ahh this is a good hard question, I hope someone comes along and helps. Goodluck my friend!

48/96 in its simplest form

Answers

Answer:

1/2

Step-by-step explanation:

just divide it I guess

1/2

48/2

=24/2

=12/2

=6/2

=3

Hope this helps :D

Help me please I need the answer for questions 9 part A and Part B

Answers

Answer:

Part A:

c = 4 + 1.50h

c = 1 + 3h

Part B:

2 hours

$7

Step-by-step explanation:

Part A:

Number of hours = h

Cost = c

Cost for Ice Dream:

c = 4 + 1.50h

Cost for Skating Paradise:

c = 1 + 3h

Part B:

Set the equation equal to each other and solve for h:

4 + 1.50h = 1 + 3h

Collect like terms

4 - 1 = -1.50h + 3h

3 = 1.50h

Divide both sides by 1.50

3/1.5 = h

2 = h

h = 2

The cost for both locations would be equivalent at 2 hours

✔️The cost is:

4 + 1.50h = 1 + 3h

4 + 1.50(2) = 1 + 3(2)

4 + 3 = 1 + 6

7 = 7

The cost is $7

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