Mathematics High School

In circle P, diameter QS measures 20 centimeters.



What is the approximate length of arc QR? Round to the nearest tenth of a centimeter.

9.9 centimeters
19.9 centimeters
21.5 centimeters
43.0 centimeters

Answers

Answer 1
It's 19.9 Centimeters
Answer 2

Answer:

the answer is 19.9 cm

Related Questions

Write 6 ×10000 5×1000 2×100 3×1 as a number.

Answers

first: 6 x 10000= 60000
second: 5 x 1000= 5000
third: 2 x 100= 200
fourth 3 x 1= 3
fifth add them all together: 65203

write an equation in point slope form for the line through the given point with the given slope
(8,3) m =5
A. Y+3=5(x-8)
B. Y+3=5x-8
C.y-3=5(x-8)
D.y-3=5(x+8)

Answers

it is c. because when writing in point slope for it would be y1-y2=m(x1-x2) and since it is all positive the minus signs woulnd't change to addition.  

Option C is correct, y-3=5(x-8) is the equation in point slope form for the line through the given point with the given slope

What is Slope of Line?

The slope of the line is the ratio of the rise to the run, or rise divided by the run. It describes the steepness of line in the coordinate plane.

The slope intercept form of a line is y=mx+b, where m is slope and b is the y intercept.

The slope of line passing through two points (x₁, y₁) and (x₂, y₂) is

m=y₂-y₁/x₂-x₁

The point slope form of a line is y-y₁=m(x-x₁)

We need to find  equation in point slope form for the line through the given point (8,3) with the given slope m =5

y-3=5(x-8)

Hence, option C is correct, y-3=5(x-8) is the equation in point slope form for the line through the given point with the given slope

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Simplify the expression

sin(pi+x) + sin(pi - x)
...?

Answers

The solution to the problem is as follows:

sin(π+x) = -sin(x) and sin(π-x)= sin(x) 

sin(π+x) + sin(π-x) = -sin(x) + sin(x) 

=  0


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Jose has had his eye on a pair of basketball shoes at a shoe store for a long time, but at a price of $150, the shoes have always been a little bit more than his budget could handle. However, today he saw a sign in the window that said, "Basketball Shoes – 20% off." Which type of discount is this?

A. A sale
B. A coupon
C. A rebate
D. A gift card

Answers

The answer is A it is a SALE.  Bcuz it was advertised on their window.
Answer:

This type of a discount is:

       A.   A sale

Step-by-step explanation:

Sale--

A sale is a transaction between two parties one is a buyer and other is seller in which the goods or services are provided by the seller at a lower rate as compared to the normal price of it.

The price so lowered is known as a discounted price and the price at which the item is to be sold is known as a sale price.

Here the store is keeping the basketball shoes at a sale which is displayed on window as:

      "Basketball Shoes – 20% off."

            Hence, the correct option is: Option: A

                                A. A sale

What is 20x346 equal ??

Answers

6,920 hope this helps you :p

Solve the equation

x^2 + 5x + 4 = 0

Answers

x^2 + 5x + 4 = 0
(x + 4)(x + 1) = 0

x + 4 = 0
x = -4 <===

x + 1 = 0
x = -1 <===

Step-by-step explanation:

answer:

x^2 + 5x + 4 = 0

x²+4x+x+4=0

x(x+4)+1(x+4)=0

(x+4)(x+1)=0 is your answer

Which statement is an example of the Identity Property of Multiplication?
8 • 0 = 0
8 • 1 = 8
8 • –1 = –8
–8 • –1 = 8

Answers

The Identity Property of Multiplication states that any number multiplied by 1 does not change. Therefore the correct answer would be: 8 • 1 = 8.

Option 2 - 8 x 1 = 8 is the correct alternative.

We have the options as mentioned in the question.

We have to determine which is an example of Identity Property of Multiplication.

What is Identity Property of Multiplication ?

The identity property of multiplication says that the product of 1 and any number is that number.

According to the question -

Using the Identity Property of Multiplication -

8 x 1 = 8

Hence, Option 2 is the correct alternative.

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B is the midpoint of AC. Solve for the length of AB if AB=5x+3 and BC=7x+9

Answers

I hope this helps you

how do you find the equation of a triangles altitude using point slope formula?

Answers

1. An altitude of a triangle is a line segment from a vertex perpendicular to the opposite side. Find the equations of the altitudes of the triangle with vertices (4, 5),(-4, 1) and (2, -5). Do this by solving a system of two of two of the altitude equations and showing that the intersection point also belongs to the third line. 
(Scroll Down for Answer!)Answer by jim_thompson5910(34047)   (Show Source):You can put this solution on YOUR website!
If we plot the points and connect them, we get this triangle: 

 

Let point 
A=(xA,yA)
B=(xB,yB)
C=(xC,yC) 



------------------------------- 
Let's find the equation of the segment AB 


Start with the general formula 

 


Plug in the given points 

 


Simplify and combine like terms 

 


So the equation of the line through AB is  


------------------------------- 
Let's find the equation of the segment BC 


Start with the general formula 

 


Plug in the given points 

 


Simplify and combine like terms 

 


So the equation of the line through BC is  




------------------------------- 
Let's find the equation of the segment CA 


Start with the general formula 

 


Plug in the given points 

 


Simplify and combine like terms 

 


So the equation of the line through CA is  




So we have these equations of the lines that make up the triangle 


 



So to find the equation of the line that is perpendicular to  that goes through the point C(2,-5), simply negate and invert the slope  to get 

Now plug the slope and the point (2,-5) into  


 

 Solve for y and simplify 

So the altitude for vertex C is  



Now to find the equation of the line that is perpendicular to  that goes through the point A(4,5), simply negate and invert the slope to get  

Now plug the slope and the point (2,-5) into  


 

 Solve for y and simplify 

So the altitude for vertex A is  




Now to find the equation of the line that is perpendicular to  that goes through the point B(-4,1), simply negate and invert the slope to get  

Now plug the slope and the point (-4,1) into  


 

 Solve for y and simplify 

So the altitude for vertex B is  



------------------------------------------------------------ 
Now let's solve the system 


 

 Plug in  into the first equation 

 Add 2x to both sides and subtract 2 from both sides 

 Divide both sides by 3 to isolate x 


Now plug this into  

 

 



So the orthocenter is (-2/3,1/3) 

So if we plug in  into the third equation , we get 


 


 


 

 

So the orthocenter lies on the third altitude 






How do you solve (a^3b)^4(ab^6)^2?

Answers

I hope this helps you

The maximum gas mileage for a compact car is estimated using the graph shown below.


The average gas mileage for an SUV is modeled by the function m(s)=−0.015(s−55)2+15, where s is the SUV's speed in miles per hour.


The difference in maximum mileage between these two vehicles is _____ mpg (miles per gallon).


Enter the number that correctly fills in the blank in the previous sentence.

Answers

the graph's maximum is at 33 mpg for reference −0.015(x−55)2+15so just plug it inlet's set y to 0

y=−0.015(x−55)2+15 0=−0.015(x−55)2+15 subtract 15 −15=−0.015(x−55)2 divide both sides by -0.015 1000=(x−55)2
the other maximum is at x=55
and we want the y value
at x=55, y=-0.015(55-55)^2+15 y=-0.015(0)+15 y=15
 the compact has a max of 33mpg and the SUV 15mpg

so you would subtract the 33 and the 15

Find the sum of 86, 331, and 909.

Answers

The sum of 86, 331, and 909 is 1,326.

Always remember that 'sum' means addition. So you simply add all of the numbers together.
the answer is 1,326 because all you had to do is add








True or False?
(a^4)(a^5) = (a)^9

Answers

The above result is true according to the property [ a^x. a^y = a^ (x+y)].

Solve the problem. Round to the nearest hundredth of a percent if needed. During clinical trials of a new drug intended to reduce the risk of heart attack, the following data indicate the occurrence of adverse reactions among 1100 adult male trial members. What is the probability that an adult male using the drug will experience nausea?


A. 2.02%

B. 1.73%

C. 27.59%

D. 2.18%

Answers

Based on the given table above, the correct answer would be option D. 2.18%. So how did we get this result. Looking at the table, the number of adults experiencing nausea is 24 and the total number of trial members is 1100. So given these values, the probability of getting nausea (as a percentage) is (24/1100)*100. (0.0218)*100, so we get 2.18. Which gives the probability of 2.18%. Hope this answer helps.

Factor 5x^3 40x^2 - 100x

Answers

5x^3+40x^2-100x
5x(x^2+8x-20)
=5x(x+10)(x-2)

explain the difference between 1/(sinx) and ((sin^-1)x) ...?

Answers

1/sin(x) is the inverse of the entire value of sin(x), while sin⁻¹(x) is the inverse of the value of x. These are different operations so yield different answers. For example, let x = π/2
1/sin(π/2) = 1
sin⁻¹(π/2) does not exist because π/2 lies outside the range of sin(x).

please helpppppp!!!!!

How far does the first car will drive in the 2 hours head start it gets? Now, at t = 2 hours, both cars are moving. How much faster is the second car than the first car? You can determine this by dividing the head start by the difference in the two speeds. If car 1 has a 20-mile head start, and car two is five mph faster, then it will take 20/5 = 4 hours to catch up.

Answers

let they meet after second car travels for x hours'
let v be the speed  of second car and V be speed of first car.
Then time taken by first car=x+2
V(x+2)=vx (distance covered is same.)
[tex] \frac{v}{V} = \frac{x+2}{x} subtract 1 from both sides \frac{v-V}{V} = \frac{2}{x} v-V= \frac{2V}{x} [/tex]


Eugenia wants to find out how fast she walked along the hiking trail that took her 1.5 h to complete. She counted the number of steps with a pedometer and got 10000 steps. in order to calculate the distance she walked she estimated the length of her stride. she walked 10 steps three times at her usual rate and measured the distance with a measuring tape (the smallest division is 1cm) and got 745cm, 748 cm, 739 cm. Find the length of her stride. What is the length of the hiking trail? What are absolute and relative uncertainties in that length?

Answers

1) length of her stride

- 745/10 = 74.5

- 748/10 = 74.8

-739/10 = 73.9

Average: 74.5 + 74.8 + 73.9]/3 = 74.4 cm

2) length of the hiking trial

74.4 cm/step * 10,000steps = 744,000 cm = 7,440 m = 7.4 km

3) Absolute error

legnth with the smallest step measure: 73.9 * 10,000 = 739,000 cm

length with the largest step measure: 74.8 * 10,000 = 748,000 cm

maximum error 744,000cm - 739,000cm = 5,000 cm

4)  relative error

[absolute error / measure] * 100

[5,000 cm / 744,000 cm] * 100 = 0.67%

A model is made of a car. The car is 8 FEET long and the model is 10 INCHES long. What is the ratio of the length of the car to the length of the model? a)10:8 b)48:5 c)5:48 d)8:10

Answers

correct answer
is D 8:10

Answer:

8:10

Step-by-step explanation:

What's the account balance after 6 years when you invest$1600 with interest rate of 6.5% compounded continuously

Answers

Not sure use brainly greate Website for answers

Answer:the answer is the one given below, you need to use A=Pe^rt

Step-by-step explanation:

P= amount of money invested

r=interest rate percentage in decimal form

t=time in years

A=total money in account ️

Each ratio in simplest form 16:40

Answers

16:40 = 4:10 = 2:5

hope this helps you

describe how to draw a line that passes through the origin and has a slope of 3/5

Answers

A slope of 3/5 means it rises 3 units and runs 5 units. Thus, to draw such a line, we go up three units from the origin and go to the right 5 units after this point. The point obtained will be one point on the line. We continue this procedure for two to three points and then join them to obtain a line.

Find tan θ if sec θ = (sqrt26)/5 and sin θ < 0.

Answers

so cos θ = 5/sqrt(26)
adjacent = 5
hypotenuse = sqrt 26
by pythagoras opposite = 1
so sin θ = 1/sqrt (26)
and tan θ = 1/5

Your class is selling boxes of flower seeds as a fundraiser. The total profit p depends on the amount x that your class charges for each box of seeds. The equation p equals negative 0.5 x squared plus 36 x minus 141p=−0.5x 2+36x−141 models the profit of the fundraiser.​ What's the smallest​ amount in​ dollars that you can charge and make a profit of at least ​$471​?

Answers

I cant figure it out sorry :/

mBAC = 22.21°
mABC = 137.67°
mBCA = 20.12°

Classify the triangle by its angles

Answers

Scalene no angles or sides are the same therefor a scalene triangle. Obtuse Scalene if you want to be precise. 

Find x and y. Remember that a + bi = c + di exactly when a = c and b = d. 8 = (4+8i)(x+yi)

Answers

x+yi = 8/(4+8i)x+yi = 2/(1+2i)x+yi = 2/(1+2i) × (1−2i)/(1−2i)x+yi = (2−4i) /5x+yi = 2/5−4/5i

x= 2/5
y= -4/5i

A flagpole is located at the edge of a sheer y = 70-ft cliff at the bank of a river of width x = 40 ft. See the figure below. An observer on the opposite side of the river measures an angle of 9° between her line of sight to the top of the flagpole and her line of sight to the top of the cliff. Find the height of the flagpole.

Answers

I would solve this using tangents.  Let h be height of flagpole.
Set up 2 right triangles, each with a base of 40.
The larger triangle has height of "h+70"
Smaller triangle has height of 70.

Now write the tangent ratios:
[tex]tan A = \frac{h+70}{40} , tan B = \frac{70}{40} [/tex]

Note: A-B = 9
To solve for h we need to use the "Difference Angle" formula for Tangent
[tex]tan (A-B) = \frac{tanA - tanB}{1+tan A tan B}[/tex]
Plug in what we know:
[tex]tan(9) = \frac{ \frac{h+70}{40} - \frac{70}{40}}{1+ (\frac{h+70}{40})(\frac{7}{4})} [/tex]
[tex]tan (9) = \frac{ \frac{h}{40}}{ \frac{7h +650}{160}} = \frac{4h}{7h+650} [/tex]
[tex]h = \frac{650 tan(9)}{4-7 tan(9)}[/tex]
[tex]h = 35.6[/tex]

When the function below is graphed, how many x-intercepts does it have? y = 2x2 - 8x + 5

Answers

It has two x-intercepts because the exponent of the equation is 2 and the graph crosses the x-axis twice

Answer:

2.

Step-by-step explanation:

Please find the attachment.

We have been given a function formula [tex]y=2x^2-8x+5[/tex]. We are asked to determine the number of x-intercepts that our function could have by graphing.

Since our given function is a quadratic function, so it could have at-most two x-intercepts as it will cross x-axis at-most two times.

Upon looking at our attached graph we can see that our given function crosses x-axis at two points, therefore, our given function has two x-intercepts.

Divide 28x3 + 42x2 - 35x by 7x

Answers

(28x³ + 42x²– 35x)/(7x) = 28x³/(7x) + 42x²/(7x) + 35x/(7x) = 4x² + 6x + 5
The answer is [tex]4 x^{2} +6x-5[/tex]

[tex] \frac{28 x^{3} +42 x^{2} -35x}{7x} = \frac{28 x^{3} }{7x} + \frac{42 x^{2} }{7x} - \frac{35x}{7x} =4 x^{2} +6x-5[/tex]

Each of the 25 student in mr mcdounld class sold 16 tickets if each ticket costs15$ how much money did the students raise

Answers

25 x 16 = 400
400 x 15 = 6000
they raised $6000

hope this helps you
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