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
Mice21 [21]
3 years ago
8

A car travels 45km in an hour. In each of the next two hours, it travels 78km. What is the average speed of the car.

Mathematics
1 answer:
romanna [79]3 years ago
7 0

Answer:

The average speed of car is 67 kilometers per hour.

Step-by-step explanation:

Given that:

Distance travelled in one hour = 45 km

Distance travelled in next 2 hours = 78*2 = 156 km

Total distance = 45+156 = 201

Total time = 1+2 =  3 hours

Average speed of the car = \frac{Total\ distance}{Total\ time}

Average speed of the car = \frac{201}{3}

Average speed of the car = 67 km/hr

Hence,

The average speed of car is 67 kilometers per hour.

You might be interested in
Given: m∠1 = 140°, find m∠6.
zavuch27 [327]
<h2><em><u>Ans</u></em><em><u>wer</u></em><em><u>:</u></em></h2>

Let m<6 be X

140° + X = 180°

X = 180° - 140°

X =40°

5 0
3 years ago
What is the sum of 8 and 7, doubled
lions [1.4K]
(8+7) x 2

= 15 x 2

= 30
7 0
2 years ago
Read 2 more answers
God please help me plz
Nat2105 [25]
You convert 432 sq inches into inches so 20.7846. Then you times that by 6. The answer is 124.7076 and if rounded 124.7
8 0
2 years ago
Determine a series of transformations that would map polygon ABCDE onto polygon A’B’C’D’E
zalisa [80]

Answer:

Reflected across x-axis followed by a dilation with a scale factor of 2 about the origin.

Step-by-step explanation:

It's clear from the graph,

Polygon ABCDE is reflected across x-axis then dilated so that it overlaps polygon A'B'C'D'E'

Let's choose a point A having coordinates (-2, -1)

By reflecting point A across x-axis,

Rule to be followed for the reflection,

(x, y) → (x, -y)

By this rule, coordinates of the image point A will be,

A(-2, -1) → A"(-2, 1)

Now point A"(-2, 1) has been dilated by a scale factor = k to form an image points A'(-4, 2).

Rule for the dilation of a point about the origin is,

A"(x, y) → A'(kx, ky)

A"(-2, 1) → A'(-2k, k)

Since, coordinates of point A' are (-4, -2),

Therefore, -2k = -4

k = 2

k = 2

Hence, polygon ABCDE was reflected across x-axis followed by a dilation with a scale factor of 2 about the origin to form polygon A'B'C'D'E'.

3 0
2 years ago
What is 848 -662 rounded the nearest hundred estimated
Leviafan [203]

Answer: 200

it would be 200 becuase it would orignally be 186 and since it says "rounded the nerest hundred estimated" you would round up in this case and get 200

3 0
3 years ago
Read 2 more answers
Other questions:
  • What is 17 divided by 5,542
    8·2 answers
  • Find the derivative dy, dx for y equals the quotient of the quantity x cubed minus 5 times x and the quantity x squared minus 1.
    6·1 answer
  • How do I solve f+4/g=6 for f showing my work
    10·1 answer
  • The product of 3 consecutive odd numbers is 3,315. Enter a simplified expression for finding the numbers. Let n be the first odd
    7·1 answer
  • In Aunt Melly’s attics there are spiders and ants, the total of 152 legs and 22 heads. How many spiders and how many ants?
    12·1 answer
  • What’s the answer to this problem?
    15·1 answer
  • Mr. Brackett works in factory with his two sons. He is really happy with his job because he gets to spend some time with his bel
    15·1 answer
  • Brittany’s brother, Nate, is two years younger than Brittany. Write an equation for Nate’s age, n, in terms of Brittany’s age, b
    12·1 answer
  • An earthquake wave travels 55 km of rock in 25
    5·1 answer
  • Help!<br> Central Angles and arc measures
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!