1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
bazaltina [42]
3 years ago
9

I really need help with this, and please explain how you got your answer!

Mathematics
1 answer:
Allisa [31]3 years ago
5 0
The bicylist rode 4.5 miles in 18 minutes.
To convert 4.5 miles in 18 minutes we can divide 60( 1 hour) by 18 which is 10/3 , and multiply it by 4.5 miles:
4.5(10/3) miles in 18(10/3) minutes = 15 miles/h
Which means that he rode at a speed of 15 miles/h for 18 minutes
Then he rode 7.5 miles in 30 minutes which means he rode at an avarage speed of 15 miles/h for half an hour.
7.5(2) miles in 30(2) minutes

Now to find the avarage of
15 miles/h for 18 minutes
15 miles/h for half an hour
As both speeds are the same the average is 15 miles an hour
I hope you understood my brief explanation
You might be interested in
akash's salary in 2014 was 25% more than that of 2013,then his previous salary was what % of present salary
marishachu [46]

Answer:

80%

Step-by-step explanation:

Focus on the important parts of the problem:

The present salary is 25% more than the previous salary.

previous = % of present ?

<u>Use a mock/fake situation.</u> Let' say the previous salary is $100.

100 = % of present

Present salary is $100 increased by 25%.

$100 X 1.25 = $125

100 = % of 125

Solve this in decimal form (convert it to a percentage later).

Let x be the percentage in decimal form.

100 = 125x

100/125 = x    Isolate "x" by dividing by sides by 125

x = 0.80

Convert 0.80 to percentage by multiplying by 100.

0.80 X 100 = 80%

When comparing two things using percentage, 100% is the same. Less than 100% is less and more than 100% is more.

Since his previous salary was less than his present salary, this answer makes sense.

Therefore his previous salary was 80% of his present salary.

3 0
3 years ago
Read 2 more answers
PLEASE HELP FOR TEST will mark brainiest !!
sdas [7]

Answer:

552.920307 yd^2 or 552.92 yd^2 for sigfigs

Step-by-step explanation:

basically you take the area of the entire circle and subtract the interior circle to leave the ring and that’s your answer

so the area formula of a circle is π r^2

the radius (r) is just half the diameter so the entire diameter is 48 so the radius is 24 - π(24)^2 = 1809.557368^2

then the interior circle’s diameter is 40 so the radius is 20 - π(20)^2 = 1256.637061^2

so now it’s just subtraction:

1809.557368 yd^2 - 1256.637061 yd^2 =
552.920307 yd^2 or 552.92 yd^2 for sigfigs

hope this helps :)

6 0
3 years ago
Read 2 more answers
please help me i will mark brainliest!!! Rewrite as a simplified fraction 0.612 also the 12 is repeating
Aleksandr [31]

Answer:

= 68/111

Step-by-step explanation:

4 0
3 years ago
A solid right pyramid has a square base with an edge length of x cm and a height of y cm. Which expression represents the volume
solniwko [45]

Answer:

Thus, volume of pyramid = \frac{1}{3}x^2y cm³

Step-by-step explanation:

Given: A solid right pyramid has a square base with an edge length of x cm and a height of y cm.

We have to choose from the given options an expression for the volume of the pyramid.

Volume of pyramid = \frac{1}{3}\times Area\ of\ base \times height

Since base is a square with edge length x cm.

Area of square = (side)² = x²

Thus, volume of pyramid = \frac{1}{3}x^2y cm³


3 0
3 years ago
Read 2 more answers
The product of 2 and 5 and then divide 3
Vesnalui [34]
2x5= p divided by 3
2x5=10
10÷3=3.33
so it is 3 1/3
5 0
3 years ago
Read 2 more answers
Other questions:
  • sara has 16 red flowers and 24 yellow flowers. she wants to make bouquets with the same number of each color flower in each bouq
    7·1 answer
  • Which of the following best describe when you need to borrow during subtracting
    14·1 answer
  • Keisha went into a park at 1:30 pm she hiked for 1 hour 35 minutes. Then she went to the picnic area for 45 minutes and left the
    14·1 answer
  • a class is having a pizza party! Half of the pie is covered with peanuts one third of the pie has pecans the rest has pistachios
    14·1 answer
  • For what length of time does the log boat travel up the ride's conveyor belt?
    14·2 answers
  • What is the value of x if e3x+6=8
    6·1 answer
  • I dont understand help me
    12·1 answer
  • What is the solution to the system of linear equations?
    10·1 answer
  • 2 of 6
    8·1 answer
  • Distance between (-4,0) and (2,2)
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!