2 balls are rolling towards each other from the opposite ends of a straight tube that is
420 cm long. Ball A travels 50 cm while ball B travels 30 cm in the 1st second. Both
balls travel 2 cm less than the previous distance in each subsequent second. How long
does it take for the two balls to meet?

Answers

Answer 1
6 seconds!!!!!!!!!!!! that should be the answer
Answer 2

The two balls take 5 seconds to meet together

What is an arithmetic sequence?

It is a sequence where the difference between each consecutive term is the same.

Example:

2, 4, 6, 8, 10 is an arithmetic sequence.

We have,

Ball A.

Distance travel after n seconds = 50, 48, 46, 44, 42, 40,,,,,

Sum of nth term = n/2[100 + (n - 1)2 ]

Ball B.

Distance travel after t seconds = 30, 28, 26, 24, 22, 20,,,,,

Sum of nth term = n/2 [60 + (n - 1)2]

Now,

n/2 [100 + (n - 1)2] + n/2 [60 + (n - 1)2] = 420

50n + 2n - 2 + 30n + 2n - 2 = 420

80n + 4n - 4 = 410

84n = 414

n = 414/84

n = 5

Thus,

The ball takes 5 seconds to meet.

Learn more about arithmetic sequence here:

https://brainly.com/question/10396151

#SPJ2


Related Questions

Please help me with this question !!!!!!!!!!

Answers

Answer:

1) 7/8  

2) 0. 9

3) 88%

Step-by-step explanation:

total CDs =  2 + 9 +5 = 16

probability of Comedy is 2 out of the total 16

= 2/16

probability of not picking one would be 1 - 2/16 = 14/16 = 7/8

7 divided by 8 = 0.875   which rounds to 0.9

0.875 x 100 gives the percentage of 87.5% which rounds to 88%

I can help!

1. 14/16 , but that reduced is 7/8

This is because in total, there are 16 cds. 14 of them arent comedy so therefore, 14/16 cds arent comedy.

2. 0.875 - you get this by doing either 14 divided by 16 or 7 divided by 8.

3. 87.5%, you would do 0.875 times 100 which gives you the percentage.

which expression would be easier to simplify if you use the commutative property to change the order of numbers

Answers

Commutative property of addition is given by : a+b = b+a , where a and b can be any expression of real numbers. It basically changes the order of the so that simplification of any expression becomes easier.

but it is with the stuff that you have on your computer or paper

I think it’s a but I could be wrong.

please help me with this 20 points if you post spam im getting your answer taken down

Answers

Answer:

The slope of the trend line is 19.286 thousand dollars. This is important because it shows that the sales of this store is increasing which intern increases profits which is important for the long term viability of this store.They y-intercept is 53.571 thousand dollars. This number represents the profits of the store in 2010 and it serves as benchmark for future years. In fifty years, we assuming that the trend continues, it will be 19.286*50+53.571 = 1017.871 thousand dollars. However, this is not appropriate because a lot can change in 50 years which can have a profound impact on the future profits.

1017.87 dollars is the correct answer

guys i am on my knees rn

Answers

Answer:

Look at the image.

Step-by-step explanation:

Answer:

3 inches = 9 for area

7 units = 14 for area

100 cm = 10000 for area

40 inches = 1600 for area

x unites = id.k

next page ----------------------------------

81 square inches = 9 for side length

4/25 = 0.39 - i think

1.96

id.k

------------------------------------------------

uh unfriend hiim or block him or smthn lol

Step-by-step explanation:

please help me. I need it!

Answers

Answer:

znd i cant really tell the numbers on the side

Step-by-step explanation:

i like ur shirt XD

Find the missing angle measurement.


A. 41°
B. 49°
C. 139°
D. 149°

Answers

i think it’s ccccccccc 139

Answer:

C: 139

Step-by-step explanation:

180 - 29 - 12 = 139.

Every triangle has a total of 180 degrees, therefore, subtract the degrees you do have, and find the missing one. Quadrilaterals have a total of 360 degrees and pentagons have 540 degrees.

What fraction of the model is shaded?

Answers

Answer:

1/5

Step-by-step explanation:

hope this helps

Answer: The answer is 1/20

i stg this is the 3rd time i've asked this question but please help me

Answers

Answer:

The FitnessGram™ Pacer Test is a multistage aerobic capacity test that progressively gets more difficult as it continues. The 20 meter pacer test will begin in 30 seconds. Line up at the start. The running speed starts slowly, but gets faster each minute after you hear this signal. Ding  A single lap should be completed each time you hear this sound. Ding  Remember to run in a straight line, and run as long as possible. The second time you fail to complete a lap before the sound, your test is over. The test will begin on the word start. On your mark, get ready, ding

Step-by-step explanation:

Select the expression equivalent to:

(3x + 2) + (-6x + 3)

Answers

Answer:

I don't really know what you mean but heres a go

x=-5/9

Step-by-step explanation:

The coordinate plane shows the graph of the function f(x)=x^4−2x^2+1. The function is defined for all real numbers. Which statement is not true for the function shown in the graph?

A. The function has symmetry with respect to the y-axis.
B. The function has a domain that is all real numbers.
C. The function has a range that is all real numbers.
D. The function has two zeros located at –1 and 1.

Answers

Answer:

C. The function has a range that is all real numbers.

Step-by-step explanation:

Y has restraints- it doesn't go below 0

therefore it isn't all real numbers. it's more like y≥0

nnnooooo liinnkkkks
A right rectangle prism has a base area of 2 1/2 square inches and a height of 11 1/2 inches. What is the volume of the prism?

A. 14 in³

B. 28 3/4 in³

C. 71 7/8 in³

D.86 1/4 in³

Answers

The answer I believe is c
C is the answer I think

PLEASE HELP ME!!!! THIS IS TIMED!!! PLEASE HELP!!!!!!!

Answers

Answer: 17

Step-by-step explanation:The other side is the same length. So its 17 :)

Answer:

18.3 = The third side

Step-by-step explanation:

Using Pythagorean Theorem; since the triangle is a right angled triangle.

Pythagorean Theorem states: A² + B² = C² (Where C is the hypotenuse, the line on the triangle opposite to the labeled right angle of the triangle, A and B would be the other 2 sides).

=> A² + B² = C²

=> 17² + B² = 25²

=> 289 + B² = 625

=> B² = 625 - 289

=> B² = 336

=> [tex]\sqrt{B^2}[/tex] = [tex]\sqrt{336}[/tex]

=> B =  [tex]\sqrt{336}[/tex]

=> B = 18.3

Hope this helps!

Math: Write a proportion to find 32% of 92

Answers

32/92=

32 ÷ 92 =


Explaining;
32/92 is the proportion answer

What is the theoretical probability of the spinner on yellow?
A. 35% B. 25% C. 1/5 D. 2/5

Answers

b. 25%
100 divided by 4 = 25
the probability can be found by taking the total number of possible choices and dividing. there is 100% of chances divided among the 4, so the answer would be 25%, because of this.

X= 100/4
X= 25

this is due today please help! 15points!

Answers

Answer:

17x +215/ 5

Step-by-step explanation:

17x +215

     5

The answer is 17x+215/5

Help me im almost done

Answers

Answer:

Iready is easy.

Step-by-step explanation:

Try your best dont use brainly to answer

pick which one you feel more confident about it.

Easy question!(exponents) Plz help!

Answers

x=-2/5

Steps:
6^x/3 +2 = 6^-14x/3
x/3+2 = -14x/3.
x +6 = -14x (multiply both sides by 3)
x = -14x - 6 (Substract 6 from both sides)
x + 14x = -6 (add 14x to both sides)
15x = -6 (collect like terms)
x = -2/5 (divide both sides by 15)

Gavin, the owner of an e-commerce site, buys flutes for $370 and then sells them on his site for $444. What is the mark-up percentage?

Answers

370 is 83% of 444, so the markup is 17%

pls plsplsplssplslslpslpslplpslslpslps

Answers

Answer:

25

Step-by-step explanation:

10 x 5= 50/2 = 25

25 because 10x5 is 50 divided by 2 is 25

Daniel has drawn a triangle with sides of length 5cm, 5cm and 8cm.What type of triangle has he drawn? * 1 point Isosceles Right-angled Equilateral Scalene

Answers

Answer:

Right angled

Step-by-step explanation:

Answer: Isosceles triangle.

Please help!!!!!!!!!!

Answers

I think the answer is A
I think the answer is B because I did the horizontal line test.

fine the volume of the figure below

Answers

Answer: Volume = 108

Step-by-step explanation:

The formula for the volume of a pyramid is: (L*W*H)/3

All of these variables are given, so plugin the given variables to the formula.

(6*6*9)/3

(324)/3

Volume = 108

Answer:

324

Step-by-step explanation:

9 x 6 x 6 = 324

surface area i think

6 + 6 + 6 + 6 + 6 + 9 = 39

Which word best describes the degree of overlap between the two data sets?

none

high

low

moderate
Two line plots with the same scale and interval, from zero to sixty, with tick marks every five units. The plots are stacked vertically for comparison. Each plot has fifteen data values. Values appear as x marks above the line. Upper plot data values are one x mark above thirty, two x makrs above thirty-five, four x marks above forty, four x marks above forty-five, one x mark above fifty, two x marks above fifty-five, and one x mark above sixty. Lower plot data values are three x marks above five, four x marks above ten, three x marks above fifteen, two x marks above twenty, one x mark above twenty-five, one x mark above thirty, and one x mark above thirty-five.

Answers

The word degree of overlap between data sets are

Low

help me, please first to Answer right gets brainly :)

Answers

Answer:

2, 3, 4, and 5 are all equal to 3.15/0.45

Step-by-step explanation:

The median number of omelets made by 5 chefs during a certain Sunday brunch is 13. The range of number if omelets made by those same chefs during that Sunday brunch is 4. Determine if the following statement is true is false or does not contain enough information. none of the chefs made more than 14 omelets

Answers

Answer:

Step-by-step explanation:

i can't really see what it says in the pic

correct answers only! No links or get reported.

Answers

Answer:

65

Step-by-step explanation:

not that hard bro

Answer:

65

Step-by-step explanation:

25^2+60^2=x^2

625+3600=x^2

4225=x^2

[tex]\sqrt{4225}[/tex]=x

x=65

You decide to use the larger suitcase to transport rectangular prism watermelons back home.Though their dimensions vary, the average rectangular watermelon has a volume of roughly 720 cubic inches. If one of these watermelons is about 10 inches long and 9 inches wide, about how tall would it be

Answers

Answer:

8 inches tall

Step-by-step explanation:

720/(10x90)= 8

I think the answer is 8 in. Hope this helps! :3

?????????????????????????????????

Answers

Answer:

3

Step-by-step explanation:

Both of them are 3, because 1000 have 3 zeros :)

Hope this helps!!

-Ketifa

What the other answer says is correct

An image shows a square prism with a height of 8 yd.
The prism has a base area of

14 yd.^2

What is the volume of the prism?

A. 22 yd.^2

B. 112 yd.^3

C. 22 yd.^3

D. 112 yd.^2

Answers

Answer:

a

Step-by-step explanation:

i just took the test

(sorry bout the other one I forgot to put the picture and it wouldn't let me delete)
Is the answer 4?
I need someone to double check

Answers

Answer:

The correct answer should be 5

Step-by-step explanation:

start at a point where the line passes through the vertex of the small grid box given and count how many units u need to go up and right to reach to the next point where the line passes in a similar way, since you need to find the rise, just count how many units u need to go up. The answer would be 5

Hope this helps!

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