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
algol [13]
3 years ago
8

B) David and Andrew are traveling to a Mathematics conference. David travels 110 miles in the same time that Andrew travels 140

miles. Andrew travels 15 miles per hour faster than David. Find the average rate of each person.
Mathematics
1 answer:
nasty-shy [4]3 years ago
3 0

Answer:

David's average speed is 55 mph and Andrew's average speed is 70 mph

Step-by-step explanation:

Let David's speed be s.

Average speed is given as:

speed = distance / time

They both spent the same time, t.

David's speed is:

s = 110 / t

=> t = 110 / s

Andrew travels 15 mph faster than David.

Andrew's speed is:

(15 + s) = 140 / t

=> t = 140 / (15 + s)

Therefore, since they spent the same time:

110 / s = 140 / (15 + s)

Cross multiply:

110(15 + s) = 140s

1650 + 110s = 140s

1650 = 140s - 110s

30s = 1650

s = 1650 / 30

s = 55 mph

Andrew's speed is:

15 + 55 = 70 mph

Therefore, David's average speed is 55 mph and Andrew's average speed is 70 mph.

You might be interested in
Help! Show work please<br>will mark brainliest ​
Arada [10]

Answer:

x = 62.23 ft

y = 47.67 ft    

Step-by-step explanation:

6 0
2 years ago
Plzzzz help me due very soon
____ [38]
The answer is 45 lmk if it’s correct
ANDDD CAN SOMEONE PLEASE HELP ME WITH MY QUESTIONS
4 0
3 years ago
The time t (in hours) that it takes a group of volunteers to build a
weeeeeb [17]

It will take 9 hours

5 0
3 years ago
Read 2 more answers
Find the exact value. <br>cos225°
Sedaia [141]
Exact form: -square root 2/2 (I don't have a square root symbol)
Decimal form: -0.70710678

3 0
3 years ago
Read 2 more answers
What is the prime factorization for 452 in exponential form
Stolb23 [73]

Answer:

2 * 2 * 113

Step-by-step explanation:

452: 2 * 226

226: 2 * 113

113 is a prime number

452: 2 * 2 * 113

452: 2^2 * 113

4 0
3 years ago
Other questions:
  • Can u help me with the whole page
    9·1 answer
  • What is the surface are of the container of oatmeal shown below? use 3.14 for pi
    13·1 answer
  • Show Your Work<br> Please help I’ll mark brainliest
    7·1 answer
  • A restaurant bill is $25, and a 20 percent tip should be given to the waiter. Which expression can be used to find the total amo
    6·2 answers
  • A Boston subway train traveling at constant speed traveled 10.1 miles in half an hour. What was the speed of the subway train?
    14·1 answer
  • Six times a number is 42 what is the answer will mark brainliest to first answer correct ​
    12·2 answers
  • Can someone help with this- ppl r making excuses that they “can’t see the picture” and I’m pretty sure everyone knows that they
    13·1 answer
  • PLEASE I NEED HELP I GOT A PUPPY AND IM EXHAUSTED HE DOESNT SLEEP AT NIGHT
    9·1 answer
  • PLEASE HELP 25 POINTS
    10·1 answer
  • Gary and Jessica exercise for a total of 18 hours per week. Jessica exercises 2 less than 3 times the hours that Gary exercises.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!