A rock sinks 160 feet in 20 seconds. Find the average rate of change per second.

Answers

Answer 1
we need to find how many feet a rock sinks per second. assuming the rock falls at a constant rate we can divide each number by 20 to get 8 feet per second.

to check our worker can multiply our feet by 20, in which we get 160.

Related Questions


A bag of sweets contains only mints, sherberts and toffees.
The ratio of the number of mints to sherberts is 2:3.
The ratio of the number of sherberts to toffees is 7:5.
What fraction of the sweets are sherberts?

Answers

The Lowest Common Multiple Of 3 and 7 is 21
This means the ratio of mints:sherberts:toffees can be written as 14:21:15
The fraction of sweets that are sherberts is therefore 21/(14+21+15) = 21/50

The fraction of the Sweets are Sherberts is 21/50

What is mathematical expression?

When we combine numbers and variables in a valid way, using operations such as addition, subtraction, multiplication, division, exponentiation, and other operations and functions as yet unlearned, the resulting combination of mathematical symbols is called a mathematical expression.

Mints:Sherbets = M:S = 2:3

Sherberts:Toffees = S:T = 7:5

Mints:Sherberts:Toffees = M:S:T = 2*7 : 7*3 : 3*5 = 14:21:15

Total sweets = 14+21+15 = 50 (Adding all the fractions  after multiplying)

Therefore, the fraction of the Sweets are Sherberts = 21/50

Read more about mathematical expression at :

https://brainly.com/question/10413253

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Answer this question to get marked as barinliest!!!!!

Answers

Here’s the answer and working out. Hope it helps

Nakeisha bought a pair of shorts online for $74. She used a coupon code to get a 10% discount.
The website also applied a 5% processing fee to the price after the discount.
How much did Nakeisha pay, in the end? Round to the nearest cent.

Answers

Answer:

the answer is 69.93

hope this helps!

For the equation y=-6/5x+3 enter the equation of a perpendicular line

Answers

Answer:

y = 5/6x + 3

Step-by-step explanation:

perpendicular line= have negative reciprocal slope

the slope of y = - 6/5x + 3 is - 6/5, and the negative reciprocal slope of - 6/5 is 5/6.

which polynomials are in standard form?

choose all answers that apply:

a. 3z-1
b. 2+4x-5x^2
c. -5p^5+2p^2-3p+1
d. none of the above

Answers

Answer:

A and C are the correct answers.

Step-by-step explanation:

Monomials without a variable go after the monomials with a variable. Variables with high exponents go first. A and C both show those.

In choice A, since 3z has a variable, it goes before 1. In choice C, since -5p^5 has the highest exponent it does go first. Then 2p^2, since it has the second highest exponent. Then -3p follows, with the lower exponent. Then 1 goes last because it has no variable and has the lowest exponent.

Please help me I’m really confused!!

Erica says that you can use the fact 6 = 2 = 3 to find 60 = 2.
Enter values to complete her explanation below.

Answers

Answer:

6÷2=3 means that 6 ones can be broken into 3 groups of 2 ones each.

60÷2=30 means that 60 ones can be broken into 30 groups of 2 ones each.

60÷2=30

Jason has saved 41% of what he needs to buy a 73$ skateboard . Jason found out 50% of 70 is the same things as 70 divided by .50= 140. So he has more than enough to purchase the skateboard. Did he solve correctly

Answers

Answer:

No, Jason did not solve correctly

Step-by-step explanation:

Jason has saved 41% of what he needs to buy a 73$ skateboard.

Jason found out 50% of 70 is the same things as 70 divided by .50= 140. So he has more than enough to purchase the skateboard. Did he solve correctly

Let compare both statements

50% of 70 = 70 ÷ 0.5 (140)

50% × 70 = 140

50/100 × 70 = 140

35 ≠ 140

JASON DID NOT SOLVE CORRECTLY

This is because the left-hand side used the operation of multiplication while the right-hand side used the operation of division.

Answer:

its actually 1.4 ...

The experimental probability that it will rain
on any given day in Houston, Texas, is about
15%. Out of 365 days, about how many days
can residents predict rain?

Answers

About 55 days

Actual result is 54.75 if you round it you get 55

To solve this you have to do 15% x 365

And you can find the days the residents predicted rain

10. The figure is a rectangle. What is x?
28

Answers

Answer:

152

Step-by-step explanation:

180 minus 28 is 152 degrees

Help, please! I will mark you!

Answers

Answer C
Explanation

Which equation can be represented by the model given below?

Answers

Answer:

No model given

Step-by-step explanation:

Find the measure of angle N

Help

Answers

Answer:

direct answer 20

Step-by-step explanation:

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Answers

Definitely C or D but I can’t see the answer choices, its blurry.

Easy points you know it’s easy points

Answers

Answer:

98 ft²

Step-by-step explanation:

Answer:

98 ft²

Step-by-step explanation:

Want points

hurry pleaseeeeeeeeeeeeeeeeeeeeeee

Answers

Answer:

option 1

Step-by-step explanation:

will give brainlist


Two angles are supplementary (add up to 180 degrees).  The measure of one angle is ten more than the other. Find the measure of each angle.

Answers

Answer:

One is 85° & another one is 95°

Step-by-step explanation:

Let x be the smaller angel

So the equation is

x+x+10=180

2x= 170

x= 85

So, the smaller one is 85° & bigger one is 85+10= 95°

Put the steps to solve the quadratic equation in order.
Solve: 7x2 - 2x - 5 = 0
X =
2+4-4(7)(-5)
207)
Select ]
X =
[Select ]
+ 12
x = - or 1
[Select]
=
27144
14
[Select]
a = 7, b = -2, c= -5
[ Select]
= - 19 or 14
[Select)

Answers

Answer:

1.) [tex]x=\frac{5}{12}[/tex]

2.) [tex]=28986[/tex]

Step-by-step explanation:

1.) [tex]\mathrm{Multiply\:the\:numbers:}\:7\cdot \:2=14[/tex], [tex]14x-2x-5=0.[/tex]

[tex]\mathrm{Add\:similar\:elements:}\:14x-2x=12x[/tex][tex], 12x-5=0.[/tex]

[tex]\mathrm{Add\:}5\mathrm{\:to\:both\:sides}, 12x-5+5=0+5.\\12x=5, \mathrm{Divide\:both\:sides\:by\:}12.\\\frac{12x}{12}=\frac{5}{12}, x=\frac{5}{12}[/tex]

2.) [tex]2+4-4\left(7\right)\left(-5\right)\cdot \:207=28986[/tex]

[tex]=28986[/tex]

3.) ?, I can't read that. Please put it more 'configurative'.

This high school stadium contains a track that surrounds a soccer field. The soccer field is 100 yards long and 70 yards wide
1.What is the area of one of the semicircles at either end of the track?
2.The school decided to cover the semicircles with grass to create a space for stretching and other activities. How many square yards of grass will the school need to cover the entire circle?
3.What is the distance around one of the semicircles at either end of the soccer field?
4.What is the distance around the inner lane of the track (i.e., the lane closest to the soccer field)? PLEASE HELP <3

Answers

Answer:

Step-by-step explanation:

1. 1923.25

2.about 3846.5 yards

3.219.91

4.639.82

Answer: See below

Step-by-step explanation:

1) 1/2 x 3.14 x 35^2

1/2 x 3.14 x 1225

1/2 x 3846.5

A = 1923.25 yd^2

2) (3.14)r^2

(3.14) (35)^2

3846.50 yd^2

3) P = d + (3.14)r^2

P = 70 + (3.14) (35)

P = 70 + 109.90

P = 179.90 yd

4) P = 2( l + w)

P = 2 (70 + 100)

P = 2 (170)

P = 340

Perimeter of the square minus the perimeter of the circle.

340 - 179.90 = 160.10 yd

Plzzzzzz help meeeee plzzzz

Answers

Answer:

Red: 47.5%, Yellow: 30%, Blue: 22.5%

Step-by-step explanation:

can someone please help me and write out the answer​

Answers

Answer:

y - (-9) = -10(x - 1)

Step-by-step explanation:

(1, -9) and (-10, 101)

Slope:

m=(y2-y1)/(x2-x1)

m=(101+9)/(-10-1)

m=110/(-11)

m = -10

Point-slope:

y - y1 = m(x - x1)

y - (-9) = -10(x - 1)

Y - ( -9 ) = -10 (x - 1)

2m² + 4m - 70
Factor and please show steps ​

Answers

Answer:

5 / -7

Step-by-step explanation:

[tex]2m^{2} + 14m - 10m - 70\\2m ( m + 7 ) - 10 ( 2m - 7 ) \\therefore, ( m + 7 ) ( 2m - 10) \\or M = 5 / -7[/tex]

find the circumference of the pizza nearest to to the nearest whole number if the radius is 7 in​

Answers

Answer:

69

Step-by-step explanation:

420+911÷360 no scope=69

someone help please!!!!

Answers

Answer:

y=4x+3

Step-by-step explanation:

Slope of the line is 4

So the equation of the parallel line is y=4x+b

To find b we use the points

-5=(4)(-2)+b

Solve

-5=-8+b

3=b

Then submit the values

y=4x+3

Can the sides of a triangle have lengths 1, 3, and 4?

Answers

Let's see.

We need to use a^2 + b^2 = c^2.

(1)^2 + (3)^2 = 4^2

1 + 9 = 16

10 DOES NOT EQUAL 16.

So, the answer to your question is no.

In a triangle any two sides must be greater than the third side
1+3>4
4=4 so it can’t have these measurements


3. When should points of intersection be included within the feasible region of a system of nonlinear inequalities
and why

Answers

Answer:

Points of intersection should be included within the feasible region (the solution set) of a system of nonlinear inequalities when the boundary lines that create the point are solid. A dashed line indicates that the points are not included in the solution set. Therefore, if one boundary line is dashed and one is solid, the point of intersection will not be included within the feasible region.

Step-by-step explanation:

Points of intersection should be included within the feasible region of nonlinear inequalities when the boundary lines that create the point are solid.

What is Inequality?

This is defined as an expression in which the sides are not equal to each other.

The presence of boundary lines which have dashed and solid ones, the point of intersection will not be included within the feasible region.

Read more about Inequality here https://brainly.com/question/24372553

Ella has three pitchers that each hold 1.5 liters of lemonade. She charges $0.38 for every 100 milliliters of lemonade.

How much will Ella make if she sells all of the lemonade in the pitchers?

Answers

Let her earning be x
The volume of 1 pitcher in millilitres = 1.5 x 1000 = 1500 ml [1 liter is 1000 milliliter]
3 pitchers = 1500 x 3 = 4500 ml
100 ml = 0.38 rs.
4500 ml = 0.38 x 4500= 1690 rs.
Answer:
$17.10
Step-by-step explanation:
theres 1000 millileters in a liter so .38 x 10 = 3.8
500 more millileters so .38 x 5 = 1.9
3.8+1.9=5.7
5.7 for one pitcher so multiply 5.7 by 3 = 17.1

For the right triangle shown, whih equation can be used to find the vaule of x

Answers

Answer:

The answer is b

Step-by-step explanation:

Answer:

the answer is B

Step-by-step explanation:

what is 5x-9+2-4=9.4

Answers

Answer:

x=5.1

Step-by-step explanation:

5x-9+2-4=9.4

5x=9.4+4-2+9

5x=20.4

x=5.1

please help
7x-y=23
y=4x-11

Answers

Answer:

hope it helps have a nice day

The number of points Jaden scored in a game is less than 45, and is also a multiple of 7. How many points could Jaden have scored

Answers

Answer:

35

Step-by-step explanation:

The first few multiples of 7 are:

× 7 = 7

× 7 = 14

× 7 = 21

× 7 = 28

× 7 = 35

× 7 = 42

× 7 = 49

× 7 = 56

× 7 = 63

× 7 = 70

The number of points Jaden scored in a game less than 45, and a multiple of 7 is 35 points

How to find how many points Jaden scored?

The multiples of 7 are;

7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98, 105......

Recall,

The number of points Jaden scored in a game is less than 45

From the options, we are left with 17 and 35

17 is not a multiple of 7

Therefore, the number of points Jaden scored in a game less than 45, and a multiple of 7 is 35 points

Learn more about multiples of numbers:

https://brainly.com/question/85194

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