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2 years ago

A seven-digit phone number in the united states consists of a three-digit exchange followed by a four-digit number.

1 answer:

7 0

10 total numbers can be used for each digit ( 0-9) except the first digit:

1st digit can be 1 of 9 numbers
other 6 digits can be 1 of 10 numbers each

multiply all the possible numbers together:

9 x 10 x 10 x 10 x 10 x 10 x 10 = 9,000,000 possible phone numbers

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Watch help

babymother [125]

Answer:

m∠RPQ = 8°

Step-by-step explanation:

m∠QRS = 4x - 15

m∠RPQ = x + 1

m∠PQR = x - 2

m∠QRS is exterior angle and m∠RPQ and m∠PQr are opposite interior angles to m∠QRS

m∠QRS = m∠RPQ + m∠PQR {Exterior angle property of triangle}

4x - 15 = x +1 + x - 2

4x - 15 = x + x + 1-2 {Combine like terms}

4x - 15 = 2x - 1 {Subtract 2x from both sides}

4x - 2x - 15 = - 1

2x - 15 = - 1 {Add 15 to both sides}

2x = -1 + 15

2x = 14 {Divide both sides by 2}

x = 14/2

x = 7

m∠RPQ = x + 1 = 7 + 1 = 8°

4 0

3 years ago

Read 2 more answers

There was a blizzard. Snow was falling at a rate of 4 ½ inches per hour. If the snow kept accumulating at the same rate, how lon

Bogdan [553]

Answer:

Step-by-step explanation:

6 0

3 years ago

A rabbit runs 35 Miles per hour. Select the animals who run at a faster unit rate per hour than the rabbit. Mark all that apply

Sever21 [200]

Reindeer and ostrich

4 0

2 years ago

1. What is the spinning mo tion of the earth called? = rotation

Tasya [4]

Answer:

<u><em>Rotation and Revolution are two motions of the earth.</em></u>

Step-by-step explanation:

The description is in the image below:

5 0

2 years ago

zzz [600]

Answer:

x = 4

Step-by-step explanation:

A trapezium is a quadrilateral (has four sides and four angles) with one pair of parallel sides. A trapezium is said to be isosceles if the bases are parallel, the two other sides known as the legs are equal and diagonals of the trapezium are equal to each other.

In trapezoid ABCD, BC and AD are the diagonals.

Hence BC = AD (property of isosceles trapezoid)

9x + 1 = 12x - 11

Simplifying:

12x - 9x = 1 + 11

3x = 12

Dividing both sides by 2:

x = 4

8 0

2 years ago