Which expression is equivalent to this expression? thank you :)

Mathematics

1 answer:

CaHeK987 [17]3 years ago

6 0

Answer:

C. -4x - 1

Step-by-step explanation:

$-\frac{1}{2}(8x+2)$

Distribute the term outside of the parenthesis, Multiply each term in the parenthesis by the term outside (do not forget to include the negative sign when multiplying);

$(-\frac{1}{2}(8x))+(-\frac{1}{2}(2))$

Simplify,

$-4x - 1$

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47. Forming a Committee Four members from a 20-person committee are to be selected randomly to serve as chair- person, vice-chai

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Answer:

116,280 different leadership structures are possible

Step-by-step explanation:

The order is important.

For example, a Committee of John, Elisa, Laura and Rose means that John is the chairperson, Elisa the vice-chairperson, Laura the secretary and Rose the treasurer. If we exchange John and Elisa, their roles are also exchanged. This means that we use the permutations formula to solve this question.

Permutations formula:

The number of possible permutations of x elements from a set of n elements is given by the following formula:

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