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Veronika [31]
3 years ago
9

Explain the purpose of statements

Mathematics
1 answer:
joja [24]3 years ago
5 0
There is no picture.
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X is all of the following except.<br> a constant<br> a varlable<br> an expression
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a constant

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How many 7-digit phone numbers are possible, assuming that the first digit can’t be a 0 or a 1? (b) re-solve (a), except now ass
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A. We are going to form 7 digit numbers from the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}

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so we have 8 choices for the 1. digit, and 10 choices for all the other 6 digits.

this means there are 8*10*10*10*10*10*10=8* 10^{6} possible numbers.

b.

consider the numbers which start with 911. There are 10*10*10*10=10 ^{4} such numbers, since for the 4th, 5th, 6th and 7th digits we have 10 choices.

then we remove this number, from the one we found in a:

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a.8*10^{6}
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3 years ago
The length of ribbons found at a seamstress are listed.
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Answer: B

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is 1.57

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Alice earned some money over the summer. She charged $11 per hour to baby-sit and $7.50 per hour to mow lawns. She baby-sat for
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(11 * 25) + (7.5 * 19) = 

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