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
Jlenok [28]
2 years ago
8

There are 39 people on a city bus. The ratio of adults to children is 10 : 3. At the next stop, 3 adults get off the bus. What i

s the new ratio of adults to children on the bus?
A 3 : 1

B 9 : 2

C 7 : 3

D 12 : 1​

Mathematics
1 answer:
svp [43]2 years ago
5 0

Answer:

<u>3:1</u>

Step-by-step explanation:

Looking at the numbers

39 and a ratio of 10:3 kinda scream that there are 30 adults and  9 children to me, but when 3 adults get off, that is only 36 people.

this means,

27 adults,

and

9 children

so if it doesn't look obvious enough, 9 x 3 is 27, so that means that 3: 1 must be our ratio because the 3 in  3:1 multiplied by 9 is 27 which is the number of adults, and the 1 in children multiplied by 9 is 9!

so there you have it, 27/9 = 3

and

                                    9/9=1

so

<u>3: 1</u>

You might be interested in
Please I really need help with 10-17
Ira Lisetskai [31]
This is for number 10

6 0
2 years ago
Explain algebraically using properties of logs how log(100x) is related to log(x)
DIA [1.3K]
Log(100x)=log(100)+logx
4 0
3 years ago
What is the 399,713 rounded to the place value of the third underlined digit of 399
maksim [4K]

The <em>correct answer</em> is:

400,000.

Explanation:

The third digit in 399 is 9. To round to this place value, we inspect the digit behind it. If the digit is 5 or greater, we round up; if it is less than 5, we round down.

The digit behind 9 is 7. Since it is greater than 5, we round up. This would ordinarily put the number up 1; however, doing that makes the 9 a 10, which in turn makes the next number 10, and the next number 4. This gives us 400,000.

4 0
3 years ago
Read 2 more answers
In a state lottery, 28 balls are numbered 1-28. Eight of them are randomly selected without replacement. To win, you only need t
podryga [215]

Answer:

2/7

Step-by-step explanation:

Each time you play, you get 1 number. Since 8/28 numbers win, you have a 8/28 chance to win if you buy one ticket. 8/28 = 2/7

3 0
2 years ago
A university is trying to determine what price to charge for tickets to football games. At a price of ​$ per​ ticket, attendance
Anika [276]

This question is incomplete, the complete question is;

A university is trying to determine what price to charge for tickets to football games. At a price of ​$24 per​ ticket, attendance averages 40,000 people per game. Every decrease of ​$4 adds 10,000 people to the average number. Every person at the game spends an average of ​$4 on concessions. What price per ticket should be charged in order to maximize​ revenue? How many people will attend at that​ price?

Answer:

a) price per ticket = $18

b) 55,000 will attend at that price

Step-by-step explanation:

Given that;

price of ticket = $24

so cost of ticket = 24 - x

every decrease of $4 adds 10,000 people

for $1 adds 2,500 people

Total people = 40000 + 2500x

Revenue function = people × cost + people × 4

so

R(x) = (40000 + 2500x)(24 - x) + (40000 + 2500x)4

R(x) = 960,000 - 40000x + 60000x - 2500x² + 160,000 + 10000x

R(x) = 1120000 + 30000x - 2500x²

R(x) = -2500x² + 30000x + 1120000

now for maximum revenue; R'(x) is to zero

so

R'(x) = d/dx(  -2500x² + 30000x + 1120000 ) = 0

⇒ -5000x + 30000 + 0 = 0

⇒ -5000x + 30000 = 0

⇒ 5000x = 30000

x = 30000 / 5000

x = 6

R'(X) = -5000 < 0 ⇒ MAXIMUM

∴ Revenue is maximum at x = 6

so cost of ticket ;

price per ticket = (24 - x) = 24 - 6 = $18

so price per ticket = $18

Number of people = 40000 + 2500x

= 40000 + (2500 × 6)

= 40000 + 15,000

= 55,000

Therefore, 55,000 will attend at that price

8 0
2 years ago
Other questions:
  • Edgar Anderson earns 300 a week plus a 15% commission only on sales he makes after his first 1,000 in sales. If me. Anderson’s s
    7·1 answer
  • Need help please provide steps
    7·2 answers
  • What value of q satisfies this equation?<br> 59 + 5q = 159 - 11
    6·2 answers
  • It takes
    11·1 answer
  • TThe GCF of 18 and 72 is
    8·2 answers
  • The length, width, and height of a rectangular prism is a, (a-13), and (a+13) respectively, which statement best describes (a-13
    13·1 answer
  • In the right triangle shown, AC = BC and AB = 8V2.
    11·1 answer
  • Which is correct?
    12·1 answer
  • A the population of bacteria in a petri dish is represented by
    15·1 answer
  • What does a data distribute look like if it's MAD equals zero
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!