chang reads 9 3/4chapters in 4 1/2 hours. what is the unit rate in chapters per hour? write your answer as a fraction or a mixed number in simplest form.

Answer:

Step-by-step explanation: i know i take this

Answer:

The simulation tool could be a coin flip, with heads up representing a girl and tails up representing a boy. One trial would require flipping the coin twice. One table would show the outcome of two coin tosses as tally marks, and indicate whether the results were boy-boy, boy-girl, or girl-girl.

Final answer:

A simulation to estimate the percentage of two-child families with two girls involves using a random number generator, assigning numbers to represent gender, and conducting repeated trials. By calculating the proportion of simulations resulting in two girls, we can estimate the percentage of such families in the town.

Explanation:

To estimate the percentage of two-child families with two girls in a town of 10,000 such families, a simple simulation could employ a random number generator as the simulation tool. We can model each child as a separate random event with an equal probability of being a girl or a boy, ignoring other complexities such as multiple births or gender selection.

Here is a step-by-step explanation of how the simulation could be designed and conducted:

Assign numbers to represent the outcomes: 1 for a girl and 0 for a boy.

For each simulation, use a random number generator to produce two numbers (each being 0 or 1) to represent the two children in a family.

If both numbers generated are 1, then that simulation represents a family with two girls.

Repeat the simulation 10,000 times, once for each family.

Count the number of simulations that resulted in two girls.

Divide the count of two-girl families by the total number of families (10,000) to get the percentage of families with two girls.

This process would simulate the random assignment of genders in two-child families and allow the estimation of the percentage of families with two girls.

FG goes through the center of the circle, so FG is diameter.

[tex]d = 2r \\ r = \dfrac{d}{2} \\ \\ r = \dfrac{6}{2} = 3[/tex]

EH=r=3

Answer: EH=3

Answer: 8%

Step-by-step explanation:

Answer:

−3a+38

Step-by-step explanation:

i simplified the expression

Answer:

4.46

Step-by-step explanation:

As the circumference of a circle is pi multiplied by the diameter to work out the radius you would first divide the circumference of 28 by pi, which gives you 8.92. This is the diameter, however the question is asking for the radius. To work out the radius you would divide the diameter by 2, which gives you 4.46. This is because the radius is half of the diameter.

1) Divide 28 by pi.

[tex]28/\pi =8.92[/tex]

2) Divide 8.92 by 2.

[tex]8.92/2=4.46[/tex]

Answer:

(6x2)+(3x3)=

Step-by-step explanation:

Step-by-step explanation:

Hello there!

This question is ambiguous.

I'm assuming you want to write an equation for the given expression.

These are just a few of the ways that we can write it:

3(6n+x)

6n+3x

:)

Answer:

d 40 for volume you multiply all the numbers by eachother

Step-by-step explanation:

4 ×2=8

8×5=40

Answer:

Volume of box = 40 cu. in.

Step-by-step explanation:

Width of box = 4 in.

Height of box = 2 in.

Length of box = 5 in.

Volume of box = Width × Height × Length

= 4 × 2 × 5

= 40 cu. in.

Answer:

x=15

Step-by-step explanation:

3(2x+5)=3x+4x

6x+15=3x+4x. *multiplied parentheses by 3*

15=3x+4x+-6. *moves all x to one side*

15=× * added

x=15

Answer: yes

Step-by-step explanation:

2x+y=4 x=1 and y=2 2(1)+2=4

y=3x-1 3(1)-1=2

Answer:

D. Undefined

Step-by-step explanation:

The line is a vertical line.

Vertical lines have undefined slopes

Answer:

Undefined

Step-by-step explanation:

Vertical lines will always have undefined slopes. This is a vertical line because it is straight up and down.

To make sure, we can test 2 points: (2,1) and (2,2) in the slope formula

y2-y1/x2-x1

2-1/2-2

1/0

It is impossible to divide by 0, so the slope is undefined.

Answer:

$54.61

Step-by-step explanation:

For this question, you would need to figure out how much the total is without the tax.

.2 x 43 = 8.6

After you do that, you would need to find the total with tax.

.07 x 43 = 3.01

Add all of those up.

43 + 8.6 + 3.01 = $54.61

Feel free to let me know if you need more help. :)

Answer: 5 hours

Step-by-step explanation:

If you get $24 for 3 hours divide them 24 divided by 3 is 8

you get 8 dollars every hour.

40 divided by 8 is 5

so you worked for 5 hours.

hope this works!!

really want brainliest!!!

The mean, median, and mode of the weekly salaries at the Midtown Construction Company are provided. We can use this information to answer questions about the percentage of salaries surpassing certain values and the total salary of all employees.

To answer the question, we need to understand what each statistical term means.

The mean is the average of a set of numbers. In this case, the mean salary is $620.

The median is the middle value of a set of numbers when they are arranged in ascending order. In this case, the median salary is $610.

The mode is the value that appears most frequently in a set of numbers. In this case, the mode salary is $600.

Now, let's answer the questions:

c. To find the percentage of employees' salaries that surpassed $645, we need to calculate the percentage of values that are greater than $645 in the data set. Since the third quartile is $645, we know that 75% of the salaries are less than or equal to $645. Therefore, about 25% of the salaries surpassed $645.

d. To find the percentage of employees' salaries that surpassed $685, we need to calculate the percentage of values that are greater than $685 in the data set. Since the 85th percentile is $685, we know that 85% of the salaries are less than or equal to $685. Therefore, about 15% of the salaries surpassed $685.

e. To find the total weekly salary of all employees, we need to multiply the mean salary ($620) by the number of employees (100). Therefore, the total weekly salary of all employees is $62,000.

Answer:

To the nearest hundredth : 628.32 [tex]cm^2[/tex]

To the nearest whole number : 628 [tex]cm^2[/tex]

Step-by-step explanation:

The formula for the area of a circle is : [tex]\pi*radius^2[/tex]

To work out the area you would first need to work out the radius. You can do this by dividing the diameter of 40 cm by 2, this gives you 20 cm. This is because the radius is half of the diameter.

Now that we have worked out the radius, the next step would be to work out the area. You can do this by multiplying pi by the radius of 20 squared, this gives you 1256.64.

The final step is to work out the area of this semi-circle. You can do this by dividing the area of 1256.64 by 2, this gives you 628.32 [tex]cm^2[/tex]. This is because a semi-circle is half of a circle.

1) Divide 40 by 2.

[tex]40/2=20 cm[/tex]

2) Multiply pi by 20 squared.

[tex]\pi*20^2=1256.64 cm^2[/tex]

3) Divide 1256.64 by 2.

[tex]1256.64/2=628.32 cm^2[/tex]

The area of the semicircle is approximately 628 square centimeters.

To find the area of a semicircle with a given diameter, we need to use the formula for the area of a circle and then divide it by 2, since a semicircle is half of a circle.

The formula for the area of a circle is:

[tex]\[ A = \pi r^2 \][/tex]

where [tex]\( r \)[/tex] is the radius of the circle. Given the diameter is 40 cm, we can find the radius by dividing the diameter by 2:

[tex]\[ r = \frac{40 \, \text{cm}}{2} = 20 \, \text{cm} \][/tex]

Now, we can calculate the area of the full circle:

[tex]\[ A_{\text{circle}} = \pi (20 \, \text{cm})^2 = 400\pi \, \text{cm}^2 \][/tex]

Since the semicircle is half of the full circle, the area of the semicircle is:

[tex]\[ A_{\text{semicircle}} = \frac{1}{2} A_{\text{circle}} = \frac{1}{2} \times 400\pi \, \text{cm}^2 = 200\pi \, \text{cm}^2 \][/tex]

Using [tex]\(\pi \approx 3.14159\)[/tex]

[tex]\[ A_{\text{semicircle}} \approx 200 \times 3.14159 \, \text{cm}^2 \approx 628.32 \, \text{cm}^2 \][/tex]

Rounding to the nearest whole number:

[tex]\[ A_{\text{semicircle}} \approx 628 \, \text{cm}^2 \][/tex]

Answer:

1. No solutions

2. one solution

3. one solution

4. infinite  many solutions

5. one solution

Step-by-step explanation:

Answer:

Step-by-step explanation:

Answer:

Step-by-step explanation:

1) -5 +3 = -2

When two numbers are in different sign, subtract and the result will have the bigger numbers sign.  The bigger number is 5. so the result is (-2)

2) -7 - 2 = -9

When two numbers have same sign, add and the result will have the common sign

3) 122 * (-9) = - 1098

4) -6 ÷ (3/4)

[tex]=(-6)*\frac{4}{3}\\\\=-2*4[/tex]

= -8

Answer:

hope its right lol

To solve the equation -5+1/4x=3x+6 by graphing, rewrite the equation, graph it, and identify where the line crosses the x-axis. This x-coordinate represents the solution. If the line doesn't cross the x-axis, there's no solution.

To solve the equation −5+1/4x=3x+6 by graphing, begin by rewriting the equation as 1/4x − 3x = 6 + 5. This simplifies to -2.75x = 11. Next, graph the equation y = -2.75x + 11 on a coordinate plane.

To find the x-coordinate for the solution, see where the line crosses the x-axis (meaning y = 0). This will give you your solution, which is the value of x that makes the equation true.

However, you may find that graphing the given equation results in a line that does not intersect the x-axis. This means the equation has no solution when y equals to zero.

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Answer:

b >-54/x^2

Step-by-step explanation:

2-bx^2<56

Subtract 2 from each side

2-2-bx^2<56-2

-bx^2 <54

Divide by -1, remembering to flip the inequality

bx^2 > -54

Divide each side by x^2

bx^2/x^2 > -54/x^2

b >-54/x^2

Answer:

b > -54/x²

Step-by-step explanation:

2 - bx² < 56

2 - 56 < bx²

-54 < bx²

-54/x² < b

b > -54/x²

Answer:

School ended at 3:20 pm

Step-by-step explanation:

The school ended at the same time as the final bell. We will call this time "x". After 20 minutes the practice began, therefore it began at "x + 20 min" and it lasted for 30 min, therefore it ended at "x + 50 min". She took an additional 15 minutes to get home, therefore she got home at "x + 65 min" or "x + 1h05min". We know that she arrived at 4:25, so:

x + 1:05 = 4:25

x = 4:25 - 1:05

x = 3:20 p.m.

School ended at 3:20 pm

Answer:

10.2 years

gain is $2,704.00

rate of return is 22%

Step-by-step explanation:

The it would take for mutual to double can be determined the future value formula as shown below:

=nper(rate,pmt,-pv,fv)

rate is the rate of return of 7% per year

pmt is the periodic amount placed in the mutual fund and it not applicable here

pv is the original amount invested which is $7,500

fv is the future worth of $15,000

=nper(7%,0,-7500,15000)=10.2 years

cost of shares=actual cost of purchase+broker's commission

                      =(800*$15.34)+$20=$12,292.00  

gain on shares=sales proceeds-cost=(800*$18.77)-$20-$12,292.00=$2,704.00  

rate of return=gain/original cost=$2,704.00/$12,292.00  =22%

Answer:

the slope is 5 the y intercept is 5

Step-by-step explanation:

slope intercept form makes this true

please mark brainliest :)

Answer:

The slope is 10 and the eqation is y+5x Please pray that it is right

Step-by-step explanation:

Answer:

x=-12

Step-by-step explanation:

−2x−24+24=0+24

−2x=24

Step 2: Divide both sides by -2.

−2x /−2 = 24 /−2

x=-12

Answer:

h(-1) =-3

Step-by-step explanation:

h(x) = 2x - 1

Let x = -1

h(-1) = 2(-1) -1

h(-1) = -2-1

h(-1) = -3

Answer:

Ocean Currents bringing cooler air.

Step-by-step explanation:

Being closer to the ocean is also right but this one makes both right.Being closer to the cold ocean brings colder air.

The cooler temperatures observed on moving from Tennessee to California could be due to:

Temperature is the degree of coldness or hotness of an object or a particular place.

The temperature of an area is affected by:

California is area that is closer to the oceans.

Therefore, the cooler temperatures observed on moving from Tennessee to California could be due to:

Learn more about about temperature at: https://brainly.com/question/4735135

Answer:

65°

Step-by-step explanation:

all angles in a trapezium equate to 360°

R is 115°

115+115=230

360-230=130

130÷2=65

Answer:

65

Step-by-step explanation:

sum of co-interior angles is 180

115 + P =180

P = 180-115 = 65

Answer:

2

Step-by-step explanation:

If you add them all you get 14, divide it by the amount of terms, 7, and you get 2.