Which point gives the y-intercept of f(x) = - x2 + 4x - 3?
A) (-3,0)
B) (0,3)
C) (0.-3)
D) (3,0)

Answer:

[tex]\frac{(82)(2.4)^2}{104.139} \leq \sigma^2 \leq \frac{(82)(2.4)^2}{62.132}[/tex]

[tex] 4.525 \leq \sigma^2 \leq 7.602[/tex]

Now we just take square root on both sides of the interval and we got:

[tex] 2.127 \leq \sigma \leq 2.757[/tex]

Step-by-step explanation:

Information given

[tex]\bar X=32.1[/tex] represent the sample mean

[tex]\mu[/tex] population mean (variable of interest)

s=2.4 represent the sample standard deviation

n=83 represent the sample size  

Confidence interval

The confidence interval for the population variance is given by the following formula:

[tex]\frac{(n-1)s^2}{\chi^2_{\alpha/2}} \leq \sigma^2 \leq \frac{(n-1)s^2}{\chi^2_{1-\alpha/2}}[/tex]

The degrees of freedom given by:

[tex]df=n-1=8-1=7[/tex]

The confidence level is 0.90 or 90%, the value of [tex]\alpha=0.1[/tex] and [tex]\alpha/2 =0.05[/tex], and we can use excel, a calculator or a table to find the critical values.  

The excel commands would be: "=CHISQ.INV(0.05,82)" "=CHISQ.INV(0.95,82)". so for this case the critical values are:

[tex]\chi^2_{\alpha/2}=104.139[/tex]

[tex]\chi^2_{1- \alpha/2}=62.132[/tex]

The confidence interval is given by:

[tex]\frac{(82)(2.4)^2}{104.139} \leq \sigma^2 \leq \frac{(82)(2.4)^2}{62.132}[/tex]

[tex] 4.525 \leq \sigma^2 \leq 7.602[/tex]

Now we just take square root on both sides of the interval and we got:

[tex] 2.127 \leq \sigma \leq 2.757[/tex]

Answer:

17.6

Step-by-step explanation:

Formula= sumfx÷sumf

sumfx= 63×0+34×0+27×1+13×2=53

sumfx=0+0+1+2=3

53÷3= 17.6

final answer =17.6

Answer:

that is not a point to the line

Step-by-step explanation:

Answer:

Ella incorrectly combined the r coefficients. The correctly simplified expression is b Plus 3r.

Step-by-step explanation:

(3b+4r)+(-2b-r)

Open the bracket

=3b+4r-2b-r

Combine the like coefficient

=3b-2b+4r-r

=b+3r

Ella incorrectly combined the r coefficients. The correctly simplified expression is b Plus 3r.

Answer:

Im like 2 years late, but the answer is D

Step-by-step explanation:

Ella incorrectly combined the r coefficients, the correct simplified expression is b+3r.

person below or above me is correct.

Answer:

32% probability that a randomly selected adult in North Dakota will be a female who has enrolled in college.

Step-by-step explanation:

We have these following probabilities:

48.6% probability that a randomly selected adult in North Dakota is a female.

If a randomly selected adult in North Dakota is over 18, 65.9% probability that they have enrolled in college at some point in their lives.

These events are independent.

This means that to find the probability that a randomly selected adult in North Dakota will be a female who has enrolled in college, we can just multiply these probabilities.

P = 0.486*0.659 = 0.32 = 32%

32% probability that a randomly selected adult in North Dakota will be a female who has enrolled in college.

Answer:

the probability that a randomly selected adult in North Dakota will be a female who has enrolled in

college is 32%

Step-by-step explanation:

Given;

48.6% of the North Dakota population over 18 years old is female

P(f) = 48.6% = 0.486

65.9% of the total population of North Dakota over 18 years old has enrolled in college at some point in their lives;

P(c) = 65.9% = 0.659

Since, these two events are independent of each other, the probability that a randomly selected adult in North Dakota will be a female who has enrolled in

college is;

P(f∩c) = P(f) × P(c) = 0.486 × 0.659 = 0.320274

P(f∩c) = 0.32

P(f∩c) = 32%

Answer:

D (59,126.68, 61,939.32)

Step-by-step explanation:

A confidence interval has two bounds, a lower bound and an upper bound. These bounds depend of the sample mean and of the margin of error.

The lower bound is the sample mean subtracted by the margin of error.

The upper bound is the margin of error added to the sample mean.

In this question:

Sample mean: 60,533

Margin of error: 1406.32

Lower bound: 60,533 - 1406.32 = 59,126.28

Upper bound: 60,533 + 1406.32 = 61,939.32

So the correct answer is:

D (59,126.68, 61,939.32)

Answer:

22.5m,

2+2=4

therefore:

9+9=18

and to get 2 to equal 1 half it,

half of 9= 4.5, add it to 18 , and you have 22.5.

:)

sorry for any mistakes, I'm not that good, but i thought i could manage this :)

Answer:

B) 285 in.2

Step-by-step explanation:

Reason 19 x 15 = 285 in.2

Given Information:

Length of room = l = 8 feet

Width of room = w = 7 feet

Required Information:

Amount of carpet = ?

Answer:

Amount of carpet = 56 ft²

Step-by-step explanation:

Jason wants to replace the carpet in the utility room of his house.

We are given the dimensions of the room and we are asked to  find the required amount of carpet in square feet.

The required amount of carpet is given by

[tex]A = w\times l[/tex]

where w is the width of room and l is the length of the room.

[tex]A = 7\times 8\\\\A = 56 \:[/tex]

Therefore, Jason need 56 square feet of carpet for the utility room.

Answer:

Step-by-step explanation:

numbers are 8,9,10,11,12,13,14,15

total events(numbers)=8

multiples of 3 are 9,12,15

or favorable events are 9,12,15

number of favorable events=3

P=3/8

Answer:

-2s

Step-by-step explanation:

Answer:

-2s

Step-by-step explanation:

2-4 is equal to negitive 2

-2

and since they are like terms with the s, the answer is

-2s

hope this helps! ;)

Answer:

maybe 25

Step-by-step explanation:

If you rearrange the shape it makes it in to a square and you would just need to mutiply.

Answer:

A -B-C

Step-by-step explanation:

Line A is going by sevens till it hit s 25 it dosnt fit

line b is going by 5 but 41 dosnt fit

and with c its going by 6 but 41 dosnt fit

Answer:

C and E

Step-by-step explanation:

16, 32, 38, 39, 41, 42, 58

and

18, 30, 34, 38, 43, 45, 68

The outliers are 16

and

68

Answer:

[tex]f = \frac{ - 6g}{5} [/tex]

Step-by-step explanation:

6f + 9g = 3g + f

6f - f = 3g - 9g

5f = - 6g

[tex]f = \frac{ - 6g}{5} [/tex]

Answer:

B

Step-by-step explanation:

Answer:

96

Step-by-step explanation:

eighth multiple of 12 = 12 * 8 = 96

Answer:

96

Step-by-step explanation:

12×1=12

12×2=24

12×3=36

12×4=48

12×5=60

12×6=72

12×7=84

12×8=96

Answer:

325,452 more meteors fell during the Perseid meteor shower

Step-by-step explanation:

An year has 365 days.

Each day has 24 hours.

Each hour has 60 minutes.

Minutes in an year:

365*24*60 = 525600

Persoid:

[tex]1 + \frac{1}{5} = 1 + 0.2 = 1.2[/tex]

One each 1.2 minutes. How many during an year?

1 meteor - 1.2 minutes.

x meteors - 525600 minutes.

[tex]1.2x = 525600[/tex]

[tex]x = \frac{525600}{1.2}[/tex]

[tex]x = 438000[/tex]

438,000 meteors fell during the Persoid shower.

Leonid:

[tex]4 + \frac{2}{3} = 4.67[/tex]

One each 4.67 minutes. How many during an year.

1 meteor - 4.67 minutes.

x meteors - 525600 minutes.

[tex]4.67x = 525600[/tex]

[tex]x = \frac{525600}{4.67}[/tex]

[tex]x = 112548[/tex]

112,548 meteors fell during the Leonid Shower.

How many more meteors fell during the Perseid meteor shower?

438,000 - 112,548 = 325,452

325,452 more meteors fell during the Perseid meteor shower

Answer:

5 SETS OF 10 WE CAN MAKE, 8 OBJECTS WILL LEFT.

Step-by-step explanation:

Answer:

We can Make 5 sets of 10 and have 8 left over :)

Step-by-step explanation:

we have 58 objects and we make them into sets of 10

1 set=10

1 set  2 set  3 set 4 set 5 set        |       1 one 2 one 3 one 4 one 5 one 6 one 7               ()        ()          ()       ()       ()             |       one 8 one

can i get brainliest

Answer:

Using the formula provided, the value of that investment after 10 years is

A = P(1 + r/n) ^nt

   = 4500 x (1 + (4/100)/4)^(10 x 4)

   = 4500 x (1.01)^40

   = 6699.89$

Hope this helps!

:)

The value of that investment after 10 years is $6699.89

[tex]A = P(1 + r/n) ^{nt}\\\\= 4500 \times (1 + (4/100)/4)^(10 \times 4)\\\\= 4500 \times (1.01)^{40}[/tex]

= 6699.89

learn more about the investment here: https://brainly.com/question/24002393

he can be no cash in his account

Answer:

1/4

Step-by-step explanation:

Simplify the following:

(3^2/6^2)/(2^2/2^2)

Multiply the numerator by the reciprocal of the denominator, (3^2/6^2)/(2^2/2^2) = 3^2/6^2×2^2/2^2:

(3^2×2^2)/(6^2×2^2)

(3^2×2^2)/(6^2×2^2) = 2^2/2^2×3^2/6^2 = 3^2/6^2:

3^2/6^2

6^2 = 36:

3^2/36

3^2 = 9:

9/36

The gcd of 9 and 36 is 9, so 9/36 = (9×1)/(9×4) = 9/9×1/4 = 1/4:

Answer:  1/4

Answer:

Because if you multiply fractions you get a smaller number! for instance: (1/2)*(1/2)=(1/4) so you get a much smaller value. you merely multiply across so the denominator gets smaller.

Answer:

p = sqrt 11 + 4

Step-by-step explanation:

Answer:

16 miles

Step-by-step explanation:

We can write the ratio of miles:hours as 80:5 using the given information. Because we want to find the distance of 1 hour, we can divide the ratio by 5 (because 5/5 is 1, and we want 1 on the "right side") which gets us 16:1. This means that the motorcycle traveled 16 miles in one hour. Hope this helps!

Answer:

16 miles in 1 hour

Step-by-step explanation:

We can use ratios to solve

80 miles           x miles

------------------- = ------------------

5 hours             1 hours

Using cross products

80*1 = 5x

Divide each side by 5

80/5 = 5x/5

16 =x

16 miles in 1 hour

Answer:

- 1/2     (or - 0.5)

Step-by-step explanation:

so first, simplify by combining like terms.

so 8w-6w = 2w

so now we have

2w - 8 = 4w - 7

now we have to get the w's to one side of the equation so we can solve for it. so that mean we have to subtract 2w from both sides. 2w - 2w is 0. and then 4w - 2w = 2w. so now we have

-8 = 2w - 7

then to slowly start isolating w, add 7 to both sides of th equation. so now its

-1 = 2w

finally to get w by itself divide 2 from both sides.

and the answer is

-[tex]\frac{1}{2}[/tex] = w

Answer:

9 and 10

Step-by-step explanation:

We know that 9 can be expressed as √81, and 10 is equal to √100, and because 81 < 84 < 100, it is in between 9 and 10. Hope this helps!

Answer:

Yes

Step-by-step explanation:

1 yard is approximately 3 feet. The hypotenuse of the base (24 x 24) of the box is 33.94 inches. Then the hypotenuse of the Base's hypotenuse and the height of 14 inches is 36.72 inches, which is just over 3 feet, so the stick should fit.

Answer:

minute per words because it would be in accurate.

Answer:

x = -2

Step-by-step explanation:

The x coordinate of the midpoint is found by adding the x coordinates together and dividing by 2

( -4+0)/2 = -4/2 = -2

The y coordinate of the midpoint is found by adding the y coordinates together and dividing by 2

( 8+10)/2 = 18/2 = 9

Answer:

Step-by-step explanation:

9(2.3n+6)+10.45>43.7

(9*2.3n)+(9*6)+10.45>43.7

20.7n+54+10.45>43.7

20.7n+64.45>43.7