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
Aleksandr [31]
3 years ago
9

Assume every 10-digit natural number is a possible telephone number except those that begin with 0, 1 or 2. What fraction of tel

ephone numbers begins with 8 and ends with 8?
Mathematics
1 answer:
lana [24]3 years ago
5 0

Answer: 1/70

Step-by-step explanation:

This is a question that can also be interpreted as what is the probability of having the first number of a phone number to be 8 and the last number of the phone number to also be 8. This answer gives the fraction of the phone numbers that starts with 8 and end with 8.

Since three numbers (0,1,2) cannot start a phone number and we are left to pick from 7 numbers,

then the probability of figure "8" starting phone number = 1/7

Since all 10 numbers can possibly end a phone number,

then the probability of having figure "8" as the last digit of a phone number = 1/10

Hence probability of having "8" as the first and last digit of a phone number = fraction of total telephone numbers that begin with digit 8 and end with digit 8 = 1/7 × 1/10 = 1/70.

You might be interested in
Please help me. It’s due in 20 minutes.
egoroff_w [7]

Answer:whatever the first number was times 2

Step-by-step explanation:

3 0
3 years ago
This property says you can rewrite 3 x (4 + 5) as (3 x 4) + (3 x 5).
Varvara68 [4.7K]
<span> 3 x (4 + 5) as (3 x 4) + (3 x 5)
This is the distributive property</span>
6 0
3 years ago
Read 2 more answers
1. Mark and Bill have a combined weight of 170
qwelly [4]
<h3>Equation : x + y = 170 and y = 2x - 40</h3><h3>The weight of Bill is 70 pounds and weight of mark is 100 pounds</h3>

<em><u>Solution:</u></em>

Let the weight of Bill be "x"

Let the weight of mark be "y"

Given that,

Mark and Bill have a combined weight of 170  pounds

Therefore,

x + y = 170 ------- eqn 1

Mark weighs 40 pounds less than twice Bill's  weight

y = 2x - 40 ------- eqn 2

<em><u>Substitute eqn 2 in eqn 1</u></em>

x + 2x - 40 = 170

3x = 170 + 40

3x = 210

x = 70

<em><u>Substitute x = 70 in eqn 2</u></em>

y = 2(70) - 40

y = 140 - 40

y = 100

Thus weight of Bill is 70 pounds and weight of mark is 100 pounds

6 0
3 years ago
Estimate 73% of 42 by rounding
lozanna [386]

Answer:

The estimate is 41

4 0
3 years ago
Read 2 more answers
Muriel says she has written a system of two linear equations that has an infinite number of solutions. One of the equations of t
Assoli18 [71]

Answer: B) y= 2/3x - 3

Step-by-step explanation:

On edge

3 0
3 years ago
Other questions:
  • 225.286 rounded to hundredths on a numberline
    7·2 answers
  • You pick a card at random what is p(3 or even)
    11·1 answer
  • The sum of the digits of a two-digit number is 8. If the digits are interchanged ,new number is 10 more than double the original
    9·1 answer
  • TWENTY POINTS!!!! Find the correct simplified answer; 6x-2(5-2x)=
    8·1 answer
  • What is the length of the base of a right triangle with an area of 20m2 and the height of 4 m
    7·1 answer
  • In the current year Aveeno reported net income of $50,400which was a 12% increase over prior year net income Compute prior year
    14·1 answer
  • The perimter of a rectangle is 34 units. Its width is 6.5 units. Write an equation to determine the length (l) if the rectangle
    14·1 answer
  • What type of question can be solved using Cramer's rule?<br>​
    8·1 answer
  • Classify each number below as an integer or not.
    14·1 answer
  • a transporter has one lorry and five pickups. the lorry can carry 100 bags of maize while each pickup can carry 20 bags. the tra
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!