i will give brainliest

Using the normal distribution, it is found that 62.46% of students would be expected to score between 350 and 550.

In a normal distribution 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]

In this problem, the mean and the standard deviation are respectively, given by: [tex]\mu = 425, \sigma = 110[/tex]

The proportion of students that would be expected to score between 350 and 550 is the p-value of Z when X = 550 subtracted by the p-value of Z when X = 350, hence:

X = 550:

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

[tex]Z = \frac{550 - 425}{110}[/tex]

[tex]Z = 1.14[/tex]

[tex]Z = 1.14[/tex] has a p-value of 0.8729.

X = 350:

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

[tex]Z = \frac{350 - 425}{110}[/tex]

[tex]Z = -0.68[/tex]

[tex]Z = -0.68[/tex] has a p-value of 0.2483.

0.8729 - 0.2483 = 0.6246

62.46% of students would be expected to score between 350 and 550.

More can be learned about the normal distribution at https://brainly.com/question/24663213

Answer:

y = 25x +100

He will collect 275 pounds in 7 weeks

It will take him 12 weeks.

Hope this helps!

[tex][Hello,BrainlyUser!\; I'm\;Lenvy][/tex]

[tex]Your\;Answer\;Is\;Below[/tex]

Answer:

42 feet

Step-by-step explanation:

First let know what is

Yards to Feet

Note that;

1 Yard ⇒ 3 Feet

Thus, Formula: Multiply the length value by 3

Given:

Lena bought 14 yards of ribbon. How many feet of ribbon did she buy?

Therefore, 14 * 3 = 42

Hence, Answer is Lena brough 42 feet of ribbon.

~[CloudBreeze]~

Answer:

42 feet

Step-by-step explanation:

Important Info:

Lena bought 14 yards of ribbon. How many feet of ribbon did she buy?

Notice it say how many feet..

Therefore, Let's first know what yards to feet..

1 Yard → 3 feet

Since we know that We can Solve now:

To Find how many feet of ribbon she buy let's multiply;

14 x 3  = 42

or

14 + 14 + 14 = 42

Hence, Knowing that Lena brought 42 ribbon in feet.

[RevyBreeze]

[tex] \sf \: b - 7400 = {2}^{t} [/tex]

We have to make it as a function of T

So,

[tex] \sf \: b(t) = {2}^{t} + 7400[/tex]

We moved the constant to the right-hand side and changed its sign...

[tex]\red{ \rule{35pt}{2pt}} \orange{ \rule{35pt}{2pt}} \color{yellow}{ \rule{35pt} {2pt}} \green{ \rule{35pt} {2pt}} \blue{ \rule{35pt} {2pt}} \purple{ \rule{35pt} {2pt}}[/tex]

Answer:

[tex]\displaystyle \perp\:y = -\frac{4}{7}x + 6\frac{4}{7} \\ \parallel\:y = 1\frac{3}{4}x - 12[/tex]

Step-by-step explanation:

Perpendicular equations have OPPOCITE MULTIPLICATIVE INVERCE RATE OF CHANGES [SLOPES], so 1¾ becomes −⁴⁄₇, and we move forward:

[tex]\displaystyle 2 = -\frac{4}{7}[8] + b \hookrightarrow 2 = -4\frac{4}{7} + b; 6\frac{4}{7} = b \\ \\ \boxed{y = -\frac{4}{7}x + 6\frac{4}{7}}[/tex]

Parallel equations have SIMILAR RATE OF CHANGES [SLOPES], so 1¾ remains as is as we proceed:

[tex]\displaystyle 2 = 1\frac{3}{4}[8] + b \hookrightarrow 2 = 14 + b; -12 = b \\ \\ \boxed{y = 1\frac{3}{4}x - 12}[/tex]

I am joyous to assist you at any time.

The car gets 46 miles per gallon in the city.

Divide total miles driven in th city by miles per gallon to find total number of gallons of gas used:

10,000 miles / 46 miles per gallon = 217.3913 gallons of gas used.

Now multiply gallons used by price per gallon:

217.3913 x $1.75 = $380.43 per year

Answer:

Yes she is correct :)

Step-by-step explanation:

There are 100 centimeters in 1 meter so we divide the 100 by 20.

The 20 goes into 100 4 times so yes, she will use 1/4 of the wire for each bracelet :)

Have a great day!!

Please rate and mark brainliest!!

Answer:

16 eggs makes 4 batches 28 eggs makes 7 batches 52 eggs makes 13 batches

Step-by-step explanation:

I'm not sure but I believe that is correct

Answer:

1200 km

Step-by-step explanation:

Just multiply by 20

Step-by-step explanation:

9000000 could be writen as 9*(10^6)

Answer:

63 inches

Step-by-step explanation:

1 yard = 36 inches

2 yards = 72 inches

72-9=63

Using the vertex of the quadratic equation, it is found that the company should assign 5 programmers in order to complete the development as quickly as possible.

A quadratic equation is modeled by:

[tex]y = ax^2 + bx + c[/tex]

The vertex is given by:

[tex](x_v, y_v)[/tex]

In which:

[tex]x_v = -\frac{b}{2a}[/tex]

[tex]y_v = -\frac{b^2 - 4ac}{4a}[/tex]

Considering the coefficient a, we have that:

In this problem, the time needed for x programmers to finish the project is given by:

T(x) = 100 - 30x + 3x².

Which means that the coefficients are a = 3, b = -30, c = 100. The number of programmers which will minimize the time is given by:

[tex]x_v = -\frac{-30}{6} = 5[/tex]

More can be learned about the vertex of a quadratic equation at https://brainly.com/question/24737967

Answer:

10 slices of cheese at 2.48

Step-by-step explanation:

each slice is about 0.25

Answer:

Two sample test of paired means with unknown variance (standard deviation)

Step-by-step explanation:

Answer:

she has to pour 1/4 cup two times

Step-by-step explanation:

Answer:

Step-by-step explanation:

» There are 8 watermelons and 6 apples in the shopping cart. What is the ratio of apples to total fruits? Be sure to write your answer in lowest terms.

— — — — — — — — — —

Based on the problem, there are 8 watermelons and 6 apples in the shopping cart. So,

Therefore, the ratio of apples to total fruits is 8:14 and its lowest term is 4:7.

_______________∞_______________

Answer:

The first one is : B. 12

The second one is: B. 4

Step-by-step explanation:

1 Explained:

12 * 3 = 36

36 - 24 = 12

Therefore if he had taken 3 times as many he would have had 36. And 36 is 24 more than 12.

2 Explained:

blue + green + yellow = 240

120 + 40= 160

240 - 160= 80

Yellow= 80

120/20= 6

40/20= 2

80/20= 4

6 blue

2 green

4 yellow

12 in total.

Answer:

If two angles and the included side of one triangle are congruent to the ... For item numbers 3, 4 and 5 refer to the figure at the right. 3.

34 pages

Step-by-step explanation:

Answer:

1

Step-by-step explanation:

Answer:

100x5

1x9

.1x1

Step-by-step explanation:

Answer: upper bound = 89.36 and lower bound = 94.64

Step-by-step explanation:

Confidence interval for mean : [tex]\overline{x}\pm z^*\dfrac{\sigma}{\sqrt{n}}[/tex], where [tex]\overline{x}[/tex] = sample mean , n= sample size , z* = two-tailed critical value, [tex]\sigma[/tex]= population standard deviation

As per given , we have

[tex]\overline{x}[/tex] = 92

n =  55

[tex]\sigma[/tex]= 10

Critical value for 95% confidence interval = 1.96

Required confidence interval :  [tex]92\pm (1.96)\dfrac{10}{\sqrt{55}}[/tex]

[tex]92\pm (1.96)(1.3484)\approx92\pm2.64\\\\= (92-2.64,\ 92+2.64)\\\\=(89.36,\ 94.64)[/tex]

Hence, for 95% confidence interval for the mean IQ of primary school students:

upper bound = 89.36 and lower bound = 94.64

Answer:

Slope = -1/2.

Step-by-step explanation:

2 points on the line are (10, 0) which is where the line passes through the x-axis and (0, 5 ) where it passes through the y-axis.

The slope = (difference in y coordinates) / ( corresponding difference in  x coordinates)

= (5 - 0) / (0 - 10)

= -5/10

= -1/2.

Answer: 14 dollar discount

Step-by-step explanation:

Answer: X = 15  

Explanation:

Well, If 12 equals X minus 3 then we first must flip the signs.

which is adding. So we take 12 and add 3 which would get us 15.

Double check  :  15 (X) - 3 = 12

Answer:

15.4z−12

Step-by-step explanation:

Distribute:

7.4z+(−5)(−1.6z)+(−5)(2.4)

7.4z+8z+−12

Combine Like Terms:

7.4z+8z+−12

(7.4z+8z)+(−12)

15.4z+−12

Answer:

12*(x-1)

Step by Step Solution

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "2.4" was replaced by "(24/10)". 2 more similar replacement(s)

STEP

1

:

Simplify 12/5

Equation at the end of step

1

:

4x-(5•((0-(16/10•x))+12/5))

STEP

2

:

Simplify 8/5

Equation at the end of step

2

:

4x - (5 • ((0 - (8/5 • x)) + 12/5))

STEP

3

:

Adding fractions which have a common denominator :

3.1 Adding fractions which have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

-8x + 12 /5 = 12 - 8x/5

Equation at the end of step

3

:

4x - (5 • (12 - 8x)/5)

STEP

4

:

STEP

5

:

Pulling out like terms :

5.1 Pull out like factors :

12 - 8x = -4 • (2x - 3)

Equation at the end of step

5

:

4x - -4 • (2x - 3)

STEP

6

:

STEP

7

:

Pulling out like terms :

7.1 Pull out like factors :

12x - 12 = 12 • (x - 1)

Final result :

12 • (x - 1)

Answer:

A

Step-by-step explanation:

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The membership would be worth the money if the number of DVD's rented is more than 20

A linear equation is in the form:

y = mx + b

Where y,x are variables, m is the rate of change and b is the initial value of y.

Let y represent the cost of renting x DVD

They decided to create a membership for $20 flat fee and then charge $4 per DVD for members. For members:

y = 4x + 20

Non-members could also rent a DVD, but for $5 per DVD

y = 5x

The membership would be worth the money if:

5x > 4x + 20

x > 20

The membership would be worth the money if the number of DVD's rented is more than 20

Find out more on linear function at: https://brainly.com/question/15602982

Answer:

Thirty-seven and twenty-five thousandths

d

the a. isn't part sorry