Mathematics Middle School

A stone fell from the top of a cliff into the ocean.
In the air, it had an average speed of 16 m/s. In the water, it had an average speed of 3 m/s before hitting the seabed. The total distance from the top of the cliff to the seabed is 127 meters, and the stone's entire fall took 12 seconds.
How long did the stone fall in the air and how long did it fall in the water?

The stone fell in the air for _seconds and fell in the water for _ seconds.

Answers

Answer 1

Answer:

The stone fell in the air for 7 seconds and fell in the water for 5 seconds.

Step-by-step explanation:

time taken in water is 12 - 7 = 5 seconds

checking; 16*7 + 3*5 = 127 (proven

Related Questions

A rectangular prism has 10 layers with 12 cubes in each layer. What is the volume of the rectangular prism in cubic cm? I NEED HELP HURRY

Answers

The answer to it is 20

Whats is 7 = 12v - 24?

Answers

Answer:

To the nearest tenth: v = 2.6

To the nearest hundredth: v = 2.58

Fraction form = 31/12

Step-by-step explanation:

1. Add 24 to both sides to cancel it out on the right

7 = 12v - 24

+24 +24

2. Divide each side by 12

31 = 12v

31/12 = 2.5833333

12/12 = 1v = v

v = 2.583333

It’s V=31/12

(1). 7=12v-24 (12v is a variable so you move it left hand side and change its sign)

(2). 7-12v=-24 (7 is a constant so move it to the right hand side and change its sign)

(3). -12v=-24-7 (now calculate the difference -24-7)

(4). Now it’s -12v=-31, now after that divide both sides of the equation by -12

(5). So the answer is V=31/12

A clothing store uses a markup of 60% on all items they purchase to sell. What is the retail price of a pair of shoes that originally costs $350?

Answers

Answer:

560

Step-by-step explanation:

i added 6p percent

Answer:

350, percentage increased by 60% (percent) of its value = 560

Ok I know i was told it was false on the last one but I still don’t really understand the answer tho

Answers

Answer:It’s false

Step-by-step explanation:

because it goes over 7 feet and they wanted exactly 7 feet

Please help me thanks

Answers

Answer:

Step-by-step explanation:

The right answer is A

answer plz will make brainlest

Answers

Answer

Step-by-step explanation:

all you should do is search up {the equation} and put "simplified" after and results should come up

Express the area of the entire triangle?
What is the area?

Answers

Answer:

2x+21

Step-by-step explanation:

Area=Base*height

(x+7)*(x+3)

x*x=2x

7*3=21

2x+21

Answer:

Area=Base*height

(x+7)*(x+3)

x*x=2x

7*3=21

2x+21

Please help me answer these questions

Answers

Answer:

B and D

Step-by-step explanation:

4x13=52 and 10/10=1 x 13=13

I'm pretty sure it's A and c

A new service for your e-reader allows you to download electronic versions of books according to the following pricing.

Which of the following is an expression for the total cost of an order if you purchase e educational books, f classic books, and g new releases?
A. 2(2e + 4f + 10g)
B. 80(e + f + g)
C. 2(2e + 2f + 5g)
D. 2(e + 2f + 5g)

Answers

Answer: C

Step-by-step explanation:

Answer:

hey all of them is wrong it is actuly d

Step-by-step explanation:

an ice cream cone that is 4 inches tall has an opening that is 8 inches across. Find the volume of the cone

Answers

Answer:

around 67.02

Step-by-step explanation:

pls brainliest, the other answer was for a 2D shape

Help! I needs it! Will give Brainliest! :) Pls don't include links, thank u!

Answers

Line 3.. It removed the 'x' from the 10, and it's adding, not subtracting.

also, may i know your rblx user?

I will send you one request, just comment below this answer.

If x = y and y = 2, then 3x =

Answers

Answer:

Step-by-step explanation:

x = y

y = 2, then 3x =3y=3*2=6

How can you use the Distributive Property to check your work when factoring?

1. Once an expression has been factored, use the Distributive Property to expand the expression. The factored expression should be the original expression.

2. Once an expression has been factored, use the Distributive Property to factor the expression. The factored expression should be the original expression.

3. Once an expression has been factored, use the Distributive Property to factor the expression. The expanded expression should be the original expression.

4. Once an expression has been factored, use the Distributive Property to expand the expression. The expanded expression should be the original expression.

Answers

I think it could be B but I am not sure

It’s B because you need to get down to 1 number

The angles represented by the expressions (2x+46) and (3x-6) are complementary angles. find the measure of the larger angle. Im really confused. Could someone help.

Answers

Answer:

Step-by-step explanation:

complimentary angles add up to 90 so:

3x-6 + 2x +46 = 90

5x +40 = 90

5x = 50

x = 10

2(10)+46 = 66

3(10) - 6 = 24

complementary angles add up to 90 so we want to add the two angles together and set it equal to 90° so 2x+46+3x-6=90
5x+40=90
5x=50
x=10
now that we know what X is we can figure out which angle is bigger and what your answer will be,
2(10)+46=66
3(10)-6=24
and to check our answer 66+24=90 so your answer is 66°

plese help me with question.

Answers

Answer:

Step-by-step explanation:

You can go ahead and emilminate a and d because there are no 4.6.Then you can emilminate b because the quartiles must be even and 4.7 and 6 are not even

Look at pics below to answer the questions

Answers

Answer:

it wont load the pic

Step-by-step explanation:

Answer:

the first one is 3/10 and I dont know about the second one

Step-by-step explanation:

a diagram of a wheelchair ramp made of concrete is shown below how much concrete was used to make it?

Answers

Answer:

Step-by-step explanation:

It uses 552 cubic feet of concrete
4*12*5 = 240
13*4/2*12 = 312
240+312 = 552

What is the area of a rectangle that has a length of 13.5 centimeters and a width of 2.3 centimeters? Use the formula A = lw

PLEASE HELP NO SPAM/SCAM!

Answers

A=lw
A = 13.5 * 2.3 = 31.05 centimeters squared

A = L x W
A = 13.5 x 2.3
A = 31.05cm^2

— hope this helps !!

Please help me whith this

Answers

Omg why is happeinyb when

Pls help need help ASAP 50 points you will be reported if the answer is wrong

Answers

Answer:

I think it is 10

Step-by-step explanation:

Answer: i forgot what volume is can you please tell me what it means i forgot but once i understand i will help you <3

Step-by-step explanation:

A tent in the shape of a triangular prism is made using the following piece of fabric. Find the surface area of the fabric. Explain your reasoning. (PLEASE HELP ME AND PLEASE SHOW YOUR WORK/REASONING)

Answers

Answer:

..............................

Answer:

area = 85.84 ft²

Step-by-step explanation:

large rectangle area = 6 x 12 = 72 ft²

2 triangles area = 2(4 x 3.46 x 0.5) = 13.84 ft²

72 + 13.84 = 85.84 ft²

I'm solving systems and I don't understand how to do it pls helpp

Answers

Answer:

Use the process of elimination. I'll only do one example since you have 4.

Step-by-step explanation:

Let's do the first question.

2x-3y=-11

2x+y=9

Our goal here is to be left with one variable to solve, this way we can use the answer for that variable to find the other. A.K.A only find X to plug into the equation to find Y. To do this, we'll use the process of elimination, in which we need to cancel out a variable.

X seems the easiest here. To cancel 2 (in the top equation), you need to have a -2. And that -2 needs to be the x coefficient in the 2nd equation, in order for us to "cancel" it out. To get -2, you multiply 2 by -1.

-1(2x+y)= -1(9)

Note that whatever you do to one side, you need to do it to both sides! Hence, why I also multiplied 9 by -1. You should now be left with:

-2x -y = -9

Now, we cancel out the positive 2 and -2 from both equations by adding the two equations.

2x-3y= 11

-2x-y=-9

X cancels out, so we're left with -4y=-20. Solve for Y, which is 5.

-4y=-20

y=5

Now that you have the Y value, plug it into any of the two equations to find your X value.

2x-3y=11

2x-3(5)=11

2x-15=11

2x=26

x=13

And voilah! Our Y value is 5, and our X value is 13.

It's pretty simple once you understand what's going on. All that we did was to cancel out one variable (either X or Y) in the two equations so that we're left with only one variable to solve. If we cancel out X, we only need to solve for Y. You do this by manipulating one of the two equations (doesn't matter which one). Once you find either X or Y, all you need to is to plug it into one of the original equations. Then, you'll have both X and Y.

And that my friend, is the process of elimination. Good luck!

Nzkbxaibzeugey was

What is the value of the larger zero of the function defined by x²+12x+27?
A. 9
B. 3
C. -3
D. -9

Answers

answer: D
jfjdbfbfvg

The answer should be letter D

could someone please help me with this?

Answers

The answer is in the image below, btw I’m not completely sure if I’m right but hope it helps : )

the value in the top times 6. ex. 1 x 6, 2 x 6

The perimeter of an equilateral triangle with side s is 3s. Diana is making a decorative pillow for her living room. The pillow is shaped like a triangle with lace around the edges. Each side of the pillow is 7 inches long.
What is the perimeter of the pillow?

Answers

Answer: 21 inches

7+7+7

sorry guys but i have a lot more ques

A $300 mountain bike is discounted by 30%. What is the sales price of the bicycle?

Answers

Answer:

The price f the bikes is 90$

Step-by-step explanation:

Because 30% of 300 is 90.

To find a percentage .3 times 300 = 90 so subtract the sale from og price to get sale price (300-90)=210

Andrew is driving to visit his grandmother. He drove 171 miles in 3 hours. What was his average rate of travel for the trip?
If Andrew drives 6 more hours at the same rate, what is the total number of miles traveled for the whole trip?

Answers

the answer would be

3hr = 171 miles

Average 57 miles per hour

if he drives 6 more it would be 513 miles in total

Good luck im not 100% sure tho

Help help help help pls!

Answers

6/25 is your answer because you just add them up and take the 6

Option 2 is the correct answer! :)))

please help me im begging you :(( show ur work

Answers

Answer:

Step-by-step explanation:

first I put 3 in for all the a's then I just completed the equation.

24/2-6x2 =0 sooooooo

Please help! What is -(1/2) to the fourth power?

Answers

Answer:

1/16

/20char

-0.0625 is the answer to this question. Hope I was helpful!

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