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
Tatiana [17]
3 years ago
15

a car travels at a speed of 80 km/h for 2½ hours from town P to town Q. Then the car increases its speed by 25% and maintains th

at speed for a further 150 km from town Q to town R. Calculate the average speed for the whole journey.
Mathematics
1 answer:
ivann1987 [24]3 years ago
7 0

So this is not too hard, as with any math problem we write what we know.

Starting speed: 80km/h
Time from P to Q: 2.5h
Increase in speed: 20km/h (25% is dividing by 4)
Distance from Q to R: 150 kilometers

So let's find the speed and distance for both legs of the trip.

Speed for P to Q: 80km/h
Distance from PtoQ: 200km (2.5h * 80km/h)
Speed from Q to R: 100km/h (80 +20)
Distance from QtoR: 150km.

Now we multiply the speeds by their respective distances add them and then divide by the total distance.

((80 *200) + (100 * 150))/350 = ~88.57143

You might be interested in
The table shows a proportional relationship between x
lakkis [162]
What’s the question it’s not showing up for me or you just didn’t type it
7 0
3 years ago
Worth 14 points please help I need a expert
lesantik [10]

Answer:

x=13

Step-by-step explanation:

we can guess that the three angles are a linear pair and equal 180

in this case we can start writing a equation

x+105+62=180

now we can subtract both whole numbers from 180 but that takes longer, so we will combine the whole numbers on the left side.

x+167=180

now we can go ahead and subtract 167 from both sides. by doing so, it isolates the x and gives you your answer

180-167=13

so... x=13

4 0
3 years ago
Emilia lost $4,000 in personal belongings due to a flood at her apartment complex. Fortunately, she had renter’s insurance with
docker41 [41]
She would receive $3500 maximum.

Since she has $10,000 in coverage, the entire $4000 loss is covered.  However, the insurance company would only pay her the amount after the deductible has been taken:

4000 - 500 = 3500
3 0
3 years ago
The value of a $25,000 car depreciates at a rate of 12% per year. What will the car be worth in 5 years?
Scorpion4ik [409]

The formula for depreciation is:

Value = Starting value x (1 - rate)^time

Using the given values:

Value = 25,000 x (1-0.12)^5

Value = 25,000 x 0.88^5

Value = $13,193.30 (Round the answer as needed)

3 0
3 years ago
Read 2 more answers
Somebody plz help me
bogdanovich [222]

Answer:

i think its B

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • Tenths and Hundredths write each fraction or mixed number as a decimal 1/5=
    15·1 answer
  • Solve 3x ^2 + 2 = 11 - x ^2
    14·1 answer
  • Sheri is making 4 pounds of mixed nuts. She will use 1/3 the amount of macadamia nuts as she does almonds.
    8·2 answers
  • Help PLease URGENT!! 10 POINTS
    8·2 answers
  • Jerome solved the equation 1
    10·2 answers
  • Jules wrote the number 4 ten thousandths ona sheet of paper write this number as a decimal below
    12·1 answer
  • These tables represent an exponential function. Find the average rate of
    6·2 answers
  • (2, 14), (6, 34), (8,44), (x, 64). What is the value of x?
    11·1 answer
  • What does x equal in x= x^2-12x+36
    11·1 answer
  • Which property justifies this statement?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!