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ser-zykov [4K]
3 years ago
12

14. All phone numbers consist of a three-digit area code, a three-digit exchange, and then a four-digit number. A town uses the

587 area code and the exchange 355; for example, 587-355-1234. How many different phone numbers are possible in this town under the following
conditions?

a) At least one digit repeats in the last four digits of the phone number.
Mathematics
1 answer:
Oliga [24]3 years ago
3 0

ANSWER

9000

=  1 X 1 X 9 X 10 3 = 9000

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Mary spent half of her allowance going to the movies. She washed the family car and earned seven dollars. What is her weekly all
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Answer:If Mary spent half of her allowance the equation will begin with 1/2x or 0.5x where x is her allowance and 0.5 is half of her allowance spent. Mary also earned 7 dollars by washing the car so this will be added to her allowance spent.

The problem says that after Mary has spent half of her allowance at the movies she was left with 18 dollars so that means that the equation must be equal to 18.

The equation you want to set up is

0.5x+7=18

Where, 18-7=11

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Step-by-step explanation:

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If the cost of a 2.5 meter cloth is $30.5. What will be the cost of 22 meters ?
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Answer:

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We can write a ratio to solve

2.5 meters        22 meters

-----------------  = --------------

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Using cross products

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