Area codes are the first three digits of a 10-digit telephone number. The first digit of an area code cannot be 0 or 1.

a. How many area codes can be created if digits are allowed to be repeated?

b. How many area codes can be created if digits are not allowed to be repeated?

Answers

Answer 1

Answer:A

Step-by-step explanation:because the numbers can be allowed to be repeated


Related Questions

Round your answer to the nearest hundredth

Answers

Answer:

9.49

Step-by-step explanation:

Using the Pythagorean Theorem, we know a²+b²=c².

So 3²+9²=(BA)²

9+81=(BA)²

90=(BA)²

From this, we know BA=√90

BA=9.486

Rounding to the nearest hundredth, this is 9.49

Please consider a brainliest! Thank you!

Perform the following computation with radicals. Simplify the answer.

\sqrt{3}\cdot 2\sqrt{2}

Answers

Answer:

[tex]\sqrt{3}\cdot 2\sqrt{2}= 2 \sqrt{6}[/tex]

you can't simplify it any more

Define Rational number? And give some examples..​

Answers

Answer:

Any number that can be written as a fraction with integers is called a rational number . For example, 17 and −34 are rational numbers. (Note that there is more than one way to write the same rational number as a ratio of integers. For example, 17 and 214 represent the same rational number.)

Can someone Please help me on this easy math problem

Answers

Answer:

114

x_shun

jdebh

jejeu

A bird flies down from a higher elevation to a lower elevation at a rate of 3 meters per second. Which equation models the bird's change in elevation, in meters, after 120 seconds?

O A. (-120)(-3) = -360
O B. 120. 3 = 360
O C. 120(-3) = 360
O D. 120(-3) = -360

No links please​

Answers

Answer:

D

Step-by-step explanation:

Answer: The answer is 120(-3)= -360

Step-by-step explanation:

A. P. E. X.


34. Find the average rate of change for x 0.5 to 35 for the following temperatures in degrees Fahrenheit
recorded beginning at noon. Also interpret the meaning of x = 3.5.

Answers

The average rate of change between the interval x = 0.5 to x = 3.5 is: 5.

x = 3.5 represents 3.5 hours after noon.

How to Find Average Rate of Change Over an Interval

Given an interval of x = a to x = b, the average rate of change over the given interval of a function can be calculated using the formula below:

[tex]\frac{f(b) - f(a)}{b - a}[/tex]

Given table representing the function as shown in the image attached below, let's determine the average rate of change for x = 0.5 to x = 3.5.

a = 0.5

f(a) = 47 (from the table, when x = 0.5, y = 47)

b = 3.5

f(b) = 62 (from the table, when x = 3.5, y = 62)

Plug the values into [tex]\frac{f(b) - f(a)}{b - a}[/tex]

Average rate of change = [tex]\frac{62 - 47}{3.5 - 0.5} = \frac{15}{3} = 5[/tex]

Average rate of change = 5

x = 3.5 represents 3.5 hours after noon.

Learn more about average rate of change on:

https://brainly.com/question/11627203

Given: RS is the perpendicular bisector of AB
Prove: RA ≅ RB

Answers

Answer:

See answer below

Step-by-step explanation:

RS ⊥ bisector of AB                                   Given

AS ≅ BS                                                       Definition of ⊥ bisector

∠RSB is a right angle                                  Given

∠RSB = 90°                                                  Definition of right angle

∠RSB & ∠RSA form a linear pair                Definition of linear pair  

∠RSB + ∠RSA = 180                                     A linear pair = 180°

   90° +  ∠RSA = 180°                                   Substitution

     ∠RSA =   90                                            Subtraction

   ∠RSB = ∠RSA                                            Substitution            

    ∠RSB ≅ ∠RSA                                         If equal then congruent

   RS ≅   RS                                                  Reflexive

  Δ RAS ≅ ΔRBS                                           SAS

      RA ≅ RB                                                 CPCTC    (corresponding parts of

                                                                                     congruent triangles  ≅

Can someone please help? :(

Answers

Answer:

with what?

Step-by-step explanation:

Answer:

what do you need help with :p

Step-by-step explanation:

A 17 ft ladder leans against the side of a house. The top of the ladder is 14 ft off the ground. Find x, the angle of elevation of the ladder. Round your answer to the nearest tenth of a degree.

Answers

Answer:

55.4

Step-by-step explanation:

Think of it as a right angled triangle, the length of the ladder (17ft) is the hypotenuse, the length of the ground (14ft) is the rise, we then use sin to get the angle as the angle of elevation is the angle between the ladder and the ground hence sin^-1 (14/17) and you get your angle.

The equation 5y = 6 represents purchasing 5 tubs of yogurt for $6. Which of these equations are equivalent to the equation 5y = 6?

a
15y = 18
b
5y - 1 = 3
c
5y + 4 = 10
d
5y = 12

Answers

Answer: a 15y=18 and c 5y+4=10

Step-by-step explanation:

Write an algebraic equation to represent the situation.

A bacon cheeseburger cost $1 more than a regular cheeseburger. If 5 cheese burgers cost the same as 3 bacon cheeseburgers, how much does a regular cheeseburger cost.


I don't know if I'm just tired or what but I do not understand how I can make an equation out of this.

Answers

3(x+1) = regular cheese burger

hi guys can y’all help me with this problem? i’m stuck :p

Answers

Heyy,i believe it’s the last option:)
The first one is the correct answer

Plz help brainiest to the correct answer!

Answers

Answer:

1. x (multiplication)

2. / (division)

3. - (subtraction)

4. - (subtraction)

5. / (division)

Step-by-step explanation:

1. 24 x 3/4= 18

2. 24/-3/4=-32

3. 12- 15= -3

4. 12- (-15)= 12 + 15 = 27

5. -18 / -3/4= 24

#a

[tex]\\ \sf{:}\dashrightarrow 24\times \dfrac{3}{4}=18[/tex]

#b

[tex]\\ \sf{:}\dashrightarrow 24\div \dfrac{-3}{4}=-32[/tex]

#c

[tex]\\ \sf{:}\dashrightarrow 12-15=-3[/tex]

#d

[tex]\\ \sf{:}\dashrightarrow 12-(-15)=27[/tex]

#e

[tex]\\ \sf{:}\dashrightarrow -18\div \dfrac{-3}{4}=24[/tex]

Factorize: 2ay + 10ax - 3by - 15bx​

Answers

Answer:

(2a-3b)(y+5x)

Step-by-step explanation:

2ay + 10ax - 3by - 15bx

2a(y+5x)-3b(y+5x)

(2a-3b)(y+5x)

Answer:

(y+5x) (2a - (3b))

Step-by-step explanation:

2a (2ay/2a + 2 x 5ax/2a) + 3b (-3by/3b - 3 x 5bx/3b)

2a (y+5x) + 3b (-y - (5x))

(y+5x) (2a(y+5x)/y+5x + 3b (-y-5x)/y+5x)

What is the measure of an angle of a regular polygon with nine sides?

Answers

Answer:

140 degrees

Step-by-step explanation:

To find the value of an internal angle within this polygon, we can just multiply the number of triangles by 180 ° , then divide by the number of internal angles, which is nine. Excellent! So the interior angle of a 9 -sided polygon is 140 ° .

Jamal finds some dimes and quarters in his change purse. How much money (in dollars) does he have if he has 9 dimes and 4 quarters? How much money (in dollars) does he have if he has xx dimes and yy quarters? Total value, 9 dimes and 4 quarters (dollars): Total value, xx dimes and yy quarters (dollars):

Answers

Answer:

$1 dollar and $0.90cents

Step-by-step explanation:

A system of equations is created by using the line represented by 2x+4y = 0 and the line represented by the data in
the table below.

What is the x-value of the solution to the system?

Answers

Step-by-step explanation:

the answer 0 I think that's it

Answer:

  2

Step-by-step explanation:

The slope of the line represented by the table is ...

  m = (y2 -y1)/(x2 -x1)

  m = (-4 -8)/(3 -(-1)) = -12/4 = -3

The y-intercept of that line is ...

  b = y -mx

  b = 8 -(-3)(1) = 5

Then the slope-intercept equation of the line represented by the table is ...

  y = mx +b

  y = -3x +5

Substituting that into the equation for the given line, we have ...

  2x +4(-3x+5) = 0

  2x -12x +20 = 0

  20 = 10x . . . . . . . . add 10x and simplify

  2 = x . . . . . . . . . . divide by 2

The x-value of the solution to the system of equations is x = 2.

similar statement of √111
Pls help

Answers

111 is between 11 and 12

jackie is saving money for a coat that costs $121 if she already has $61 and saves $15 each week in how many weeks can she buy the coat make a function table

Answers

Answer:

4 weeks

Step-by-step explanation:

Total cost of coat =  $121

Money saved = $ 61

Will save $15 per week  

So let x = number of week  = $15x

Money saved + will save = Total cost of the coat

$61 + $15x = $121

-$61            = - $61

           $15x = $60

                x  = $60 ÷ 15

                 x = 4

What is the probability of drawing a king, then an ace (with replacement)?

Answers

Answer:

So there is a 2 in 13 chance to pull out either an ace or king from the deck

Step-by-step explanation:

How much money is saved by buying a baker’s dozen instead of 13 individual rolls?

Number of rolls
6
8
Baker’s dozen
Price ($)
$3.60
$4.80
$7.20

Answers

Answer:

0.60

Step-by-step explanation:

If you purchase 6 rolls, you pay $3.60

Each roll is $0.60.

If you purchase 13 individual rolls, you pay

13 x 0.6 = $7.80

But if you purchase the Baker's dozen, you pay only $7.20, so you save $0.60

7.80 - 7.20 = 0.60

Answer: 0.60

Step-by-step explanation:

If you purchase 6 rolls, you pay $3.60

Each roll is $0.60.

If you purchase 13 individual rolls, you pay

13 x 0.6 = $7.80

But if you purchase the Baker's dozen, you pay only $7.20, so you save $0.60

7.80 - 7.20 = 0.60

Plz send right answers I need this right plzzz !!!!

Answers

Answer:

its d

2.52x

3.40

____

0.00+

1.080+

7.5600

______.

8.658

Answer:

D. 8.568

Step-by-step explanation:

A quick tip is ignore the decimal points and just multiply, (which they already did for you) then add the decimal how many ever points forward the two multiples are combined.

So for 8568, since you have 2 . 52 3 . 4 you take it 3 points forward to right between the 8 and 5 for 8.568....

Also, just a word of advice, 4*4 is 16 so the answer couldn't be higher than 16, so A and C are wrong. B is actually switching the 6 and 5 so it's also wrong leaving only D

Please give me some help

Answers

Answer:

do it got a picture

Step-by-step explanation:

Rewrite the equation y + 6 = -5(x + 3) into general form (ax + by + c = 0)

Answers

Answer:  5x + y + 21 = 0

Work Shown:

y + 6 = -5(x + 3)

y + 6 = -5x - 15

y + 6 + 5x + 15 = 0

5x + y + 21 = 0

The equation is now in the form ax+by+c = 0 where a = 5, b = 1, c = 21.

Answer:

5x + y = -21

Step-by-step explanation:

y + 6 = -5x - 15

5x + y + 6 = -15

5x + y = -21

simplest form of 76% as a fraction.

Answers

Answer:

19/25

Step-by-step explanation:

Percentages are always out of 100.

76/100 = 38/50 = 19/25

Answer:

19/25

Step-by-step explanation:

76% as a fraction is 76/100. The greatest common factor of 76/100 is 2, this simplifies to 38/50, then 19/25.

A vehicle factory manufactures cars. The unit cost C (the cost in dollars to make each car) depends on the number of cars
made. If x cars are made, then the unit cost is given by the function C(x)=0.2x2 - 92x+29,516. What is the minimum
unit cost?
Do not round your answer.

Answers

Answer:

check online for more information

Please help me with the math below

Answers

Sorry a bit messy, with a ratio of 2:5:1, that means 5 would be the longest and your longest piece is 125, diving 125 by 5 gets you 25 cm, this is also your shortest piece since 1x25=25

Can someone help me with this problem plz

Answers

Answer:

mq - 12

ql - 36

Step-by-step explanation:

I am not for sure but this is what I think it is because the m-q is smaller than the q-l

Which list shows the numbers below in order from least to greatest? 5.78,-5.9,58%,-(23)/(4) A -5.9,-(23)/(4),5.78,58%, C -5.9,-(23)/(4),58%,5.78 B -(23)/(4),-5.9,58%,5.78, D 58%,-(23)/(4),5.78,-5.9

Answers

Answer:

D

Step-by-step explanation:

Find the inverse function. 1 f(x) = 1 = 2x+2 + f-1(x) = [? ]x + [​

Answers

Answer:

y= 2x - 1

Step-by-step explanation:

i hope that helps

Other Questions
How are the nervous systems of a flatworm and a fish different?One has a brain with a forebrain, a midbrain, and a hindbrain, and the other has ganglia in which integration can occur.One has nerve cells with axons and the other does not.One responds to stimuli in the environment and the other does not.One is a loose network of connected neurons without centers of integration, and one has ganglia in which integration can occur.brainliest to best answer When Abrams born his parent put $2000 in account that you did 1.2% interest compounded semi annually when he turns 16 in Spain to give him the money to buy a car how much will Abrams you receive on his 16th birthday WILL GIVE BRAINLY,5 STARS,AND THANKS the model show's a portion of a DNA strand. What does the pentagon represent in the model? The amount and the concentration of a salt solution. what is -7/9 x -2/3 in simplest form Mais family drinks a total of 10 gallons of milk every 6 weeks. How many weeks will it take Mais family to finish 3 gallons of milk?Gallons of milk per weekOR Weeks per gallon of milk How many totals atoms are present in the compound : Mg(OH)2A. 3B. 4C. 5D. 7 convert 150 K to degrees F pls help wiht this question ill give you 69 points whoever awnsers In A Midsummer Nights Dream, Shakespeare creates tension within a group of four young lovers by creating a situation in which their love is _____.romanticperfectsymmetricalunbalanced Please help me answer this Ray had $50. he bought two shirts that cost $19 each. how much money did Ray have after buying the shirts? Alex's answer to the word problem is $29. Is Alex's answer reasonable? explain. Why did the Bonus Army come to Washington D.C.? Write the equation of the line in slope-intercept form that passes through (-3, -5) and (0, 4). An online survey asked a sample of high school students their favorite type of music, and the results were tabulated above. Find the probability that a person chosen at random did not choose pop music, given that the student is a sophomore or a junior. Find the product (-2) (7) In the modern use of antidepressant medications, selective serotonin reuptake inhibitors tend to be the first "line of defense," particularly because they: It requires a 70.4 N force (parallel to the inclined plane) to pull a 5.86 kg box up a 58.1 inclined plane with a rope at a constant speed. (a) What is the coefficient of kinetic friction between the inclined plane and the box? (b) If the rope were to break, what acceleration would the box experience as it slid down the ramp? The graph shows how the number of flowers Gavin can have in his garden is related to the number of seed packets he purchases. Part A: Find the constant of Proportionality for this graph:Part B: Write an equation representing the relationship shown in the graph:Part C: The constant of proportionality means that Gavin can have__________ flowers per__________.