Mathematics Middle School

Sarah rode her bike 53 km in 4 hours.

What was her average speed per hour?

A. 5.3 km/h

B. 12.5 km/h

C. 13.25 km/h

D. 21.2 km/h

Answers

Answer 1

the answer really is 13.25 because you going to divide it


Answer 2

The average speed of Sarah is 13.25 km/hour.

Speed, distance, and Time

We know that sped, distance, and time all are in a relationship to each other. this relationship can be given as,    

[tex]\rm{Speed = \dfrac{Distance}{Time}[/tex]

Given to us,Distance traveled by Sarah = 53 km,Time needed by Sarah = 4 hours,

Speed of Sarah

[tex]\rm{Speed\ of\ Sarah=\dfrac{Distance\ traveled\ by\ Sarah}{Time\ needed\ by\ Sarah}[/tex]

[tex]\rm{Speed\ of\ Sarah=\dfrac{53\ Km}{4\ hours}[/tex]

[tex]\rm{Speed\ of\ Sarah=13.25\ km/hour[/tex]

Hence, the average speed of Sarah is 13.25 km/hour.

Learn more about Time, speed and distance:

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Related Questions

A King in ancient times agreed to reward the inventor of chess with one grain of wheat on the first of the 64 squares of a chess board. On the second square the King would place two grains of​ wheat, on the third​ square, four grains of​ wheat, and on the fourth square eight grains of wheat. If the amount of wheat is doubled in this way on each of the remaining​ squares, how many grains of wheat should be placed on square

Answers

Which square do you need help with?


Overnight the temperature dropped 1.3 degrees every hour how many hours did it take the temperature to drop 7.8 degrees

Answers

Final answer:

To calculate how long it took for the temperature to drop 7.8 degrees at a rate of 1.3 degrees per hour, divide 7.8 by 1.3, which equals 6 hours.

Explanation:

This problem can be solved using simple division. The question tells us that the temperature dropped 1.3 degrees every hour and we want to know how long it took for the temperature to drop 7.8 degrees. So, divide the total drop in temperature (7.8 degrees) by the rate of temperature drop (1.3 degrees per hour).

7.8 / 1.3 = 6

So, if the temperature dropped 1.3 degrees every hour, it would take 6 hours for the temperature to drop 7.8 degrees.

Learn more about Temperature Change here:

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2. Two angles are supplements if their sum is 180 degrees. The measure of one angle is seven-fifths the measure of its supplement. What is the measure of the smaller angle?

Answers

The answer is fiftycfour degrees have fun lol
x = 7/5(180 - x)
x = 1260/5 - 7/5x
7/5x + x = 252
7/5x + 5/5x = 252
12/5x = 252
x = 252 / (12/5)
x = 252 * 5/12
x = 1260/12
x = 105

180 - x =
180 - 105 =
75

so the smaller angle is 75

Calculate the kinetic energy of an 88-kg scooter moving at 18 m/s .

Answers

The formula for calculating kinetic energy is:
0.5 x mass x speed^2 (^2 = squared)

Answer:

kinetic energy of the scooter is 14256 joule.

Step-by-step explanation:

Since kinetic energy of an object is represented by the formula

Kinetic energy = [tex]\frac{1}{2}(\text{Mass})(\text{Velocity}^{2})[/tex]

Mass of the scooter = 88 kg

Velocity of the scooter = 18 meter per second.

Kinetic energy = [tex]\frac{1}{2}\times 88\times (18)^{2}[/tex]

                        = 44×(18)²

                        = 14256 Joule

Therefore, kinetic energy of the scooter is 14256 joule.

Find an equivalent expression to represent the product shown as a sum.
a.Which expression is equivalent to 3(2x+4)?
A.6x+4
B.6x+12
C.5x+7
D.2x+12

Answers

3(2x + 4)

3 x 2x = 6x
3 x 4 = 12

6x + 12 is your answer

B is your answer

hope this helps
The answer is B 3*2x= 6x and 3*4=12.

Suppose two angles of one triangle are congruent to two angles of another triangle. What can you conclude about the relationship between the third angles in each triangle? What does this tell you about the two triangles? Justify your answer.

Answers

That both 2 angles of the triangles are not equal to the third angle... the third angle is most likely bigger because it would not exactly be a triangle if it wasnt

solving Two-Step Equations solve & show ur work 6a-11=13

Answers

6a-11=13

add 11 to both sides  cross out -11 with +11 
 13+11 =24
6a=24   
divide 6 on both sides  
 a= 4

Since it’s -11 you add 11 to get zero, add 11 to 13 and get 24 bring down the 6A, put 6A equals 24, Then divide by six on both sides the six crosses out left with a variable so a equals 24÷6 which is four so A equals four

50 POINTS
PLEASE HELP
SIMPLE MATH


According to a survey conducted by the Texas Free Press, 75 out of 250 people do not have internet access at their homes. What percent of the people surveyed do NOT have internet access?
A- 12.5%
B- 30%
C- 37.5%
D- 70%

______________________________________________________

An equation with one missing value is shown below.
5/7 divided by __ equals/= 5/7 · 25
Which number should be placed in the blank spot to make the equation true?

A- 4
B- 1/4
C- 25
D- 1/25
___________________________________________________________

A list of numbers is shown below.
4/3 , 1.3 , 85% , - 3/8
Which list shows the numbers in DESCENDING order?
A- - 3/8 , 85% , 1.3 , 4/3
B- - 3/8 , 85% , 4/3 , 1.3
C- 4/3 , 1.3, 85% , - 3/8
D- - 3/8 , 1.3 , 4/3 , 85%
______________________________________________________


please do not guess
please answer all three easy questions
thank you :3
im so sleepy and have to do homework
z
z
Z

Answers

B
C
D
I'm not totally sure these are correct but I hope they are.I tried my very best and I hope you get more sleep.

Well the first one is B,30.

What is the product of 3/4x1/3x2/5

Answers

The product of 3/4 * 1/3 * 2/5 =

Numerator numbers: 3 * 1 * 2 = 6

Denominator numbers: 4 * 3 * 5 = 60

6/60 is the un-reduced answer.

6/60 --> 1/10

Because 1/10 can go into 6/60.

So the answer is 1/10.

Final answer:

To find the product of 3/4, 1/3, and 2/5, multiply the numerators to get 6 and the denominators to get 60, resulting in 6/60. This simplifies to 1/10.

Explanation:

The question asks us to find the product of the three fractions: 3/4, 1/3, and 2/5. To calculate this, we multiply the numerators together and then the denominators together:

Numerators: 3 times 1 times 2 = 6

Denominators: 4 times 3 times 5 = 60

Therefore, the product of 3/4, 1/3, and 2/5 is:

6/60, which can be simplified by dividing both the numerator and the denominator by their greatest common divisor, which is 6. This gives us 1/10.

Help with at least one of these ?

Answers

5. rational number
7. opposite of 1/3 is -1/3 and opposite of -7/12 is 7/12
8. absolute value of 9.8 is 9.8 and absolute value of -10/3 is 10/3

an everyday meaning of corresponding is "matching". How can this help you find the corresponding parts of two triangles?

Answers

look at the sides of the triangles. find the sides that are corresponding, or matching.

The quotient of x and 7 is equal to 13. Define variable and then write an expression to model the situation

Answers

Final answer:

The expression for the given situation "The quotient of x and 7 is equal to 13" is modeled by the linear equation x/7 = 13. By multiplying both sides by 7, we find that x equals 91.

Explanation:

The question "The quotient of x and 7 is equal to 13" can be modeled as an expression in the form of a linear equation. To define variables in this context, we let x represent the unknown number we're trying to find. The quotient of x and 7 means x divided by 7, and this is equal to 13. Therefore, we can write the linear equation as x/7 = 13.

To solve for x, we perform algebraic operations. We multiply both sides of the equation by 7 to get rid of the denominator. The expression becomes 7 * (x/7) = 13 * 7, which simplifies to x = 91.

The length of the hypotenuse, line segment GH, in triangle GJH measures 6 cm. Line segment JH measures 2 cm.

Answers

the other line segment would measure"

 6^2 = 2^2 + x^2

36 = 4 + x^2

32 = x^2

x = sqrt(32)

x =4sqrt(2) or 5.6568 ( round decimal as needed)

How do u guys solve this problem

Answers

Set 19x+3 equal to 21x-3 as they are of equal measures. They are corresponding angles
Those two angles are congruent(corresponding), so we can set these equal to each other.
19x+3=21x-3
-2x=-6
x=3

Which of the following expressions could be used to estimate the difference between -12.34 and -4.8?
-12 - 5
-12 + 5
-12 - 4
-12 + 4

Answers

-12+5

for -12.34,we take it as -12
for -4.8,we take it as -5

to measure the difference,here's what you need to do

-12-(-5)
=-12+5
thus the ans is -12+5

hope it helps

Answer:

-12-(-5)

=-12+5

The ans is -12+5

Step-by-step explanation:

Someone help please!

Answers

LN is 180 degrees

180  - 41 = x

x  = 139 degrees

hope this helps
180-41=139..........

Translate the word phrase into a variable expression:
The difference of twice a number and 3.
*Note, there are no provided answers. What you write is the real answer.*

Answers

" the difference " means subtract

the difference of twice a number and 3...

2x - 3 <== ur expression

Harry's fitness trainer recommends that Harry drink 8 fluid ounces of water 8 times a day.Harry has a water bottle that's holds 1 1/4 pints of water then filled. Today, he has filled the water bottle three times and drank all of the water each time . Harry claims that he drank the total amount of water recommended by his fitness trainer. Explain why Harry's claim is not true?

Answers

that is not true since there are 16 oz in 1 pint, so he has to drink 64 oz, but in total he drank 60 oz

Miss Jones has 18 boys and 27 girls in choir. She wants them to stand in equal rows. Only boys or girls will be in each row ( meaning no mixed rows). What is the greatest number of students that can stand in each row

Answers

its 9 ------------------------taking up space--------------------
It 9 because 27-18=9
And miss jones want to stand in equal rowa

An electrician has 4.1 meters of wire how man 7/10 strips can he make

Answers

7/10 = 0.7 

To find the number of strips we divide:_

Number of strips = 4.1 / 0.7  =  5  with remainder 6

So he can make 5 strips -  the  length of wire remaining is too short to make another strip of  length 7/10
5.5571 in decimal form, 5 5571/10000 in mixed number form. Hope it helps!

How many sixteenth notes would be needed to have the same duration as 3 quarter notes? Represent this as a fraction.

Answers

12/3. There are 4 sixteenth notes in every quarter note.

How to cross cancel fractions for example 3/5 •15/18

Answers

You would do 15 divided by 5 equals 3, and 5 divided by 5 equals 1, so it would turn into 3/1 times 3/18. Then,18 divided by 3 equals 6, and 3 divided by 3 equals 1, so the final answer would be 1/1 times 3/6, which equals 1/2 or 3/6. 
Here is how you cross cancel these fractions:
[tex] \frac{3}{5} * \frac{15}{18} [/tex]
We can start by observing that 18 is a multiple of 3, and it is obtained by multiplying 3 by 6.
So... We can cross out 3 and put a 1 in its place, and we can do the same for 18 but instead by putting a 6 in its place.
This is what we have now:
[tex] \frac{1}{5} * \frac{15}{6} [/tex]
However, we are not done yet, we can see that 15 is a multiple of 5, which can be obtained by multiplying 5 by 3.
Therefore... We can cross out 5 and put a 1 in its place, and we can cross out 15 and put a 3 in its place. This is what we have now:
[tex] \frac{1}{1} * 3/6[/tex]
Now, we can simplify the expression above to get 1/2, or 0.5 in decimal form. Hope this helps and have a nice day!

0.003 is 1/10 of ____

0.4 is 10 times as much as _____


0.2 is 10 times as much as _____
0.2 is 1/10 of __________

Answers

.0003, .04, .02, 2 now i need to type more do i cam be more than 20 characters

What are multiples of the factors of 15

Answers

3 & 5 I think that's it
the multiples of 15 this is the answer hope this helps u if u need more help let me know

Which number is bigger 2/3, 66%

Answers

2/3=0.66666666........
66%=66/100=0.66
so, 2/3 is bigger

Which statement about the ordered pairs (3,-8) and (4,4) is true for the equation 3x-y/4=11

Answers

The (4.4) ist true for this equation
x=1/12y+11/3


Is this one of your answer choices?

factor as the product of two binomials x^2-3x+2

Answers

You said factor NOT solve for x.

x^2 - 3x + 2

(x - 2)(x - 1) = the product of two binomials.



x² - 3x + 2

which two numbers add up to -3 and multiply by 2?

-2 and -1

rewrite the expression using the above 

(x - 2)(x - 1)

hope that helps, God bless!

hideki is collecting pennies. Each month in may, june, and july, he put 200 pennies in a jug

Answers

He will have 600 pennies all together
If he collects 200 pennies each month, on May, June and July, He will have 600 pennies all together, also known as $6

teo worked for 42.5 h at $70.75 per hour. how much did he earn? show the process

Answers

Hey there!

The answer to your question is $3006.88. They key word in the problem is per hour and if you see that word that means you usually multiple. So 42.5*70.75= 3006.875 or about 3006.88


The total earning for Teo is $3006.88 if teo worked for 42.5 h at $70.75 per hour, the answer is 3006.88.

What is a linear equation?

It is defined as the relation between two variables, if we plot the graph of the linear equation we will get a straight line.

If in the linear equation, one variable is present, then the equation is known as the linear equation in one variable.

It is given that:

Teo worked for 42.5 h at $70.75 per hour.

Let x be the total earnings.

The value of x can be found as follows:

x = 42.5(70.75)

x = 3006.875

Or

x = 3006.88

Thus, the total earning for Teo is $3006.88 if teo worked for 42.5 h at $70.75 per hour, the answer is 3006.88.

Learn more about the linear equation here:

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how many one thirds are in seven halves?

Answers

7 halves = 7/2

7/2 x 3 = 21/6

6/2 = 3
21/2 = 10.5

10 halves and one fourth is your answer

hope this helps
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