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
exis [7]
3 years ago
6

A telephone number consists of seven digits, the first three representing the exchange. how many different telephone numbers are

possible within the 537 exchange? the answer is .
Mathematics
1 answer:
AveGali [126]3 years ago
8 0
Since the first three digits are 537 (the exchange), we have 7-3=4 digits left. In each of those digits, there are 10 possible numbers, 0 to 9. As there are 10 numbers possible for the first digit, there are 10 numbers for each number for the second digit, and so on. For example, if the first digit was 1, we would have 1___ (3 blanks) with each blank having 10 possibilities. As there are 10 possibilities for the second number if the number 1 is there, there are 10 possibilities for the second digit for each number possible for the digit, getting 10*10=100 possible combinations with only two numbers. The same applies to the third and fourth blank, as if the second number is 2, there are 100 possibilities for 12__ (2 blanks) to be a possibility, and there are 10 blanks for each possible combination of the first two numbers, getting 10*10*10=10^3=1,000 possible combinations. Repeat the process for the fourth digit, and you end up with 10,000 possible combinations.

Feel free to ask further questions!
You might be interested in
Out of 27 participants in a track race, 5 are from China, 4 from the U.S.A., 3 each from the U.K. and Russia, and the rest from
son4ous [18]
I think it is 4 out of 5 but i dont know the number to the nearest thousanths 
but i hope this helps
4 0
3 years ago
Please help! Question above
frez [133]

Answer:

It's the first one. (m  + n - 1) sqrt p

Step-by-step explanation:

We can combine m sqrt p and n sqrt p, resulting in m + n, and combine - sqrt p to become (m + n - 1)sqrt p

3 0
3 years ago
Help with this please now
sammy [17]

Answer:

ok dude

Step-by-step explanation:

Wʜᴇʀᴇ ɪs ǫᴜᴇsᴛɪᴏɴ?

7 0
3 years ago
Read 2 more answers
A rectangle and a square have the same area. a. The width of the rectangle is w inches. The length of the rectangle is 15 inches
harkovskaia [24]

9514 1404 393

Answer:

  a) w(4w-15)

  b) w²

  c) w(4w -15) = w²

  d) w = 5

  e) 5 by 5

Step-by-step explanation:

a) If w is the width, and the length is 15 less than 4 times the width, then the length is 4w-15. The area is the product of length and width.

  A = w(4w -15)

__

b) If w is the side length, the area of the square is (also) the product of length and width:

  A = w²

__

c) Equating the expressions for area, we have ...

  w(4w -15) = w²

__

d) we can subtract the right side to get ...

  4w² -15w -w² = 0

  3w(w -5) = 0

This has solutions w=0 and w=5. Only the positive solution is sensible in this problem.

The side length of the square is 5 units.

__

e) The rectangle is 5 units wide, and 4(5)-15 = 5 units long.

The rectangle and square have the same width and the same area, so the rectangle must be a square.

4 0
3 years ago
It takes an farm 3 days to consume 1/5 of an apple at that rate in how many days will the ant farm consume 3 apples
KonstantinChe [14]
If 1/5 of an apple is consumed in three days, we would do 3 x 5, which would give us 15. That means it takes 15 days for the ant farm to consume 1 apple. Times that by three, and it takes an ant farm 45 days to consume 3 apples.
3 0
3 years ago
Other questions:
  • OABCD is a pyramid with a rectangular base of sides 15cm by 9cm.Given that the slant height OQ is 16cm find its
    9·2 answers
  • Suppose that a point (X,Y) us chosen at random from the rectangle S defined as follows: S={(x,y) : 0<= x <=2 and 1<=y&l
    8·1 answer
  • chris buys p pairs of pants and 4 more shirts than pairs of pants. Shirts cost $18 each and pair of pants cost $25 each. What do
    9·1 answer
  • In 2004, a magazine's circulation was about 1,000,000 readers. In 2014, the magazine had about 2,000,000 readers. Write a linear
    15·1 answer
  • Which one is the greater fraction 1/2 or 19/56
    5·2 answers
  • William bought 6 CDs for $8.97 each. about how much did he spend?
    15·1 answer
  • Could someone answer this for me?​
    11·1 answer
  • Help me with this math exercice please
    13·2 answers
  • 1. (07.03 MC)<br> Solve -+<br> 2 2.<br> 5 7<br> - (4 points)<br> 35<br> 0 24<br> 7
    9·1 answer
  • Select each equation that the number 10^2 makes true.
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!