3 years ago

Given: x is an integer. Conjecture: -x is negative. Counterexample:

Mathematics

1 answer:

Setler [38]3 years ago

8 0

Answer:

-1,-2,-3,-4,-5,-6,-7,-8,-9

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Lisa and Krystal are planning trips to ten countries this year. They have 14 countries on their bucket list, in how many ways ca

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Answer:

1,001 ways for them to decide.

Step-by-step explanation:

The order in which they will visit the countries is not important, so we use the combinations formula to solve this question.

Combinations formula:

$C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

In this question:

10 countries from a set of 14. So

$C_{14,10} = \frac{14!}{10!(14-10)!} = 1001$

1,001 ways for them to decide.

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Ne4ueva [31]

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Theres 8 biography books and 25 books in total. 8:25

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A mapping diagram shows a relation, using arrows, between input and output for the following ordered pairs: (negative 5, 0), (2,

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